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Yamaha RS90LTGTA Offroad Vehicle User Manual

1. Extrovert drive sprocket RS90GT RS9OLTGT e Check for wear and damage e Replace if necessary Periodic maintenance and adjustment INITIAL EVERY 1 month Seasonally REMARKS or 600 kin 500 mi 40 hr 200 hr e Check for wear and damage Silde r nners e Replace if necessary Skis and ski run e Check for wear and damage ners e Replace if necessary e Check toe out Steering system e Adjust if necessary e Check bearing assemblies for looseness e Lubricate with specified grease Steering bearings Skis and front e Lubricate with specified shock absorbers grease Suspension compo Lubricate with specified nent grease Initial at 500 km 300 mi and every 800 km 500 mi thereafter e Check the deflection Drive track e Adjust if necessary e Make sure that all nuts bolts Fittings and fasten and screws are properly tight ers ened e Tighten if necessary e Check condition Battery e Charge if necessary TIP Brake system e After disassembling the master cylinder or caliper cylinder always change the brake fluid Regularly check the brake fluid level and add fluid if necessary e Replace the oil seals of the master cylinder and caliper cylinder every two years e Replace the brake hose every four years or if cracked or damaged 61 Periodic maintenance and adjustment ESU1
2. 95 Skis and ski runners seee 95 Steering system 96 Drive track and slide runners 98 Lubrication asioin dnai 102 Replacing a headlight bulb 103 Adjusting the headlight beams 107 Fittings and fasteners 108 Batt rv sienne 108 Replacing a fuse 109 Troubleshooting ccsssseseee 116 Stora Ge 22 terres 120 Specifications ccessceseeeeeee 122 Consumer information 125 Identification number records 125 Vehicle Emission Control Information label eee 126 YAMAHA MOTOR CORPORATION U S A SNOWMOBILE LIMITED WARRANTY ue 127 YAMAHA EXTENDED SERVICE Od Zack ee lin 130 Location of the important labels ESU10216 Read and understand all of the labels on your vehicle They contain important information for safe and proper operation of your vehicle Never remove any labels from your vehicle If a label becomes difficult to read or comes off a replacement label is available from your Yamaha deal er RS90GT RS9OLTGT Location of the important labels RS90GT RS9OLTGT 17 17 10 16 RST90 RST90GT Location of the important labels 1 RS90GT RS9OLTGT WARNING AVERTISSEMENT SEVERE INJURY OR DEATH MAY RESULT IF YOU IGNORE ANY AFIN OF THE FOLLOWING This vehicle is a high performance machine Ce I
3. ESU13780 Transporting When transporting your snowmobile on a trail er or in a truck observe the following recom mendations to help protect it from damage e RST90 Make sure that the fuel level in the fuel tank is lower than the bottom of the car buretors Otherwise the vibration and bumps from the road surface could make it possible for fuel to flow through the carbu retors into the cylinders This can result in hydrostatic lock a condition where the en gine cannot rotate because of fuel accumu lated in the engine Severe engine damage can result from hydrostatic lock When pos sible the fuel tank should be empty during transportation especially if the trip takes longer than 30 minutes Operation e If transporting the snowmobile in an open trailer or truck put a tight fitting cover on the snowmobile A cover specifically designed for your snowmobile is best This will help keep foreign objects out of the cooling vents and also help protect the snowmo bile against damage from debris on the road e If transporting the snowmobile in an open trailer or truck in areas where road salt is used coat metal suspension surfaces light ly with oil or another protectant This will help protect against corrosion Be sure to clean the snowmobile when you get to your destination to remove any corrosive salts 57 Periodic maintenance and adjustment ESU11452 Periodic inspection adjustment and lubrication wi
4. w Periodic maintenance and adjustment Loosen the locknut To increase the throttle lever free play turn the adjusting bolt in direction a To decrease the throttle lever free play turn the adjusting bolt in direction b Locknut 2 Throttle lever free play adjusting bolt 3 Throttle lever free play Throttle lever free play 2 0 3 0 mm 0 08 0 12 in 5 Tighten the locknut 6 Close the shroud RST90GT 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud and the top cover See page 63 for removal procedures 3 Remove the headlight unit bolt and the windshield stay bolts on each side of the snowmobile Headlight unit bolt 2 Windshield stay bolt 4 Unhook the headlight unit as shown then lift it up and move it forward away from the handlebar NOTICE Be careful not to scratch the snowmobile when mov ing the headlight unit Ecs00920 Headlight unit Loosen the locknut To increase the throttle lever free play turn the adjusting bolt in direction a To decrease the throttle lever free play turn the adjusting bolt in direction b Locknut 2 Throttle lever free play adjusting bolt 3 Throttle lever free play Throttle lever free play 2 0 3 0 mm 0 08 0 12 in Tighten the locknut Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay 71 Periodic maintenance
5. 14 TIP Make sure that both the red connecting lead and the black connecting lead are seated securely in the lead holders Electric starter does not operate or operates slowly e Engine stop switch is pushed in Pull it out e Faulty wire connections Check connec tions or ask a Yamaha dealer to check e Discharged battery Charge battery or see Discharged battery above e Seized engine Seizure is caused by poor lubrication inadequate fuel or an air leak Ask a Yamaha dealer to check e RST90 Hydrostatic lock occurs when fuel has filled cylinders during transportation of vehicle Remove spark plugs and turn en gine over several times with ignition off to expel excess fuel Ask a Yamaha dealer to check Engine power is low e Low coolant temperature indicator light is flashing Warm engine up e Faulty spark plugs Clean or replace spark plugs e RST90 Incorrect carburetor jetting for alti tude or temperature Ask a Yamaha dealer to check e Improper fuel flow See Engine turns over but does not start Fuel system above e Incorrect V belt clutch settings for altitude or conditions Ask a Yamaha dealer to check Engine constantly backfires or mis fires e Faulty spark plugs Replace spark plugs e Clogged fuel system See Engine turns over but does not start Fuel system above e Malfunctioning T O R S See Engine turns over but does not start Electrical system
6. Under what conditions is the clutch not covered by warranty Clutches as well as clutch components wear with use Normal wear is not covered under warranty such service is the customers responsibility Abnormal wear is however covered for one 1 year from the date of purchase Your Yamaha snowmobile dealer possesses criteria as to what constitutes abnormal wear Will the warranty be void or canceled if do not operate or maintain my new Yamaha exactly as specified in the Owner s Manual No The warranty on a new Yamaha cannot be voided or canceled However if a particular failure is caused by operation or maintenance other than as shown in the Owner s Manual that failure may not be covered under warranty Q What responsibility does my dealer have under this warranty A Each Yamaha snowmobile dealer is expected to 1 Completely set up every new machine before sale 2 Explain the operation maintenance and warranty requirements to your satisfaction at the time of sale and upon your request at any later date 3 In addition each Yamaha snowmobile dealer is held responsible for his setup service and warranty repair work Q Whom should contact if have further questions about this warranty A Your Yamaha snowmobile dealer has the informa tion and experience necessary to answer almost any questions about this warranty If the dealer is not able to do so he is expected to contact Yamaha Motor
7. ccccesseeeeeseeteeees 37 Pre operation checks ssassn 46 Pre operation check list 46 Operation ccccessseeeeeeeeeeeeeeenees 48 Starting the engine s s 48 Break in cecceeeeeeeeeeeeeeeeeeeeeeees 50 Riding your snowmobile 50 Maximizing drive track life 54 DIVING 2 ices siti E intense 55 Stopping the engine 6 56 Transporting ea 56 Periodic maintenance and adjustment 58 Periodic maintenance chart for the emission control system 59 General maintenance and lubrication Chart seses 60 TOO KIT sean ne his 62 Removing and installing the shroud and covers RS90GT RS9OLTGT RST9OGT 63 Opening and closing the shroud and removing and installing the right side cover RST90 67 Checking the spark plugs 68 Adjusting the engine idling speed RS T90 ss iirin 69 Adjusting the throttle lever free a a E E TEA EN ET E 69 Checking the throttle override system T O R S aese 72 Checking the air filter 0 73 Contents Carburetors RST90 c eeee 77 High altitude settings 0 0 77 Valve clearance 77 Engine oil and oil filter cartridge 77 Cooling system n se 83 V D lt este Bese Sete nite 88 Drive chain housing eee 91 Brake and parking brake 92 Extrovert drive sprocket RS90GT RS9OLTGT
8. e Never smoke around the battery while it is being charged Sparks may ignite the hydrogen gas created by the battery e Disconnect the negative lead first then the positive lead from the battery e Connect the positive lead first then the negative lead to the battery when install ing the battery e Never connect the battery to or discon nect it from the snowmobile while it is being charged Sparks may ignite the hydrogen gas created by the battery e Make sure that the battery terminals are tight ECS00843 NOTICE e To charge a VRLA Valve Regulated Lead Acid battery a special constant voltage battery charger is required Us ing a conventional battery charger will damage the battery e Do not charge the battery quickly Periodic maintenance and adjustment ESU14192 Replacing a fuse EWS00550 Be sure to use the specified fuse wrong fuse could cause electrical system dam age or FIRE HAZARD ECS00631 NOTICE Be sure to turn the main switch to the off position and disconnect the negative bat tery lead to prevent accidental short cir cuiting RS90GT RS90LTGT RST90GT The main fuse and the fuel injection system fuse are located under the air filter case The fuse box which contains the fuses for the in dividual circuits is located behind the right side cover 1 Remove the shroud the left and right side covers and the top cover See page 63 for removal procedures 2 Remove the
9. 10 Install the headlight unit bolts and wind shield stay bolts and then tighten them to their specified torques Tightening torques Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft lbf Windshield stay bolt 14 Nm 1 4 m kgf 10 ft Ibf 11 Install the top cover and the shroud ESU11911 Carburetors RST90 The carburetors are an important part of the engine and its emission control system which require very sophisticated adjustment There fore carburetor adjustments should be left to a Yamaha dealer who has the necessary pro fessional knowledge and experience ESU13980 High altitude settings Operating at high altitude reduces the perfor mance of a gasoline engine about 3 for ev ery 305 m 1000 ft of elevation This is because there is less air as altitude increases Less air means less oxygen available for combustion RS90GT RS9OLTGT RST9OGT Your snowmobile utilizes an electronic fuel injec tion system that delivers the optimal air fuel ratio required by the engine Therefore the fuel injection system does not need to be ad justed even for operation at high altitude RST90 Your snowmobile can be adjusted to overcome most of the problems found in high altitude riding Carburetor adjustments are the most important Less air at high altitude makes the air fuel ratio too rich which can cause poor performance Common problems are hard starting bogging and plug fouling Proper carburetion adjustments w
10. Align the holes in the rear carrier with the bolts on the carrier lock bracket and then place the rear carrier on the carrier lock bracket Slide both the backrest and the rear car rier backward until they stop Pull the carrier lock lever up to lock the backrest and the rear carrier in place Then place the lever under the rear car rier and secure it with the holder Control functions 1 Carrier lock lever ESU10862 Tow hitch bracket RST90 RST90GT ECS00241 NOTICE To prevent premature wear of the V belt avoid traveling under 10 km h 6 mi h when towing for long distances or long pe riods of time This snowmobile is equipped with a tow hitch bracket that is used to install a tow hitch Use the tow hitch bracket within the specified weight limits KO 1 Tow hitch bracket TIP A tow hitch is not included with the snowmo bile and must be purchased separately 35 Control functions Tow weight limit 120 kgf 264 Ibf Vertical weight limit 15 kgf 33 Ibf ESU10605 Fuel EWS00071 Gasoline and gasoline vapors are ex tremely flammable To avoid fires and ex plosions and to reduce the risk of injury when refueling follow these instructions Make sure there is sufficient gasoline in the tank 1 Before refueling turn off the engine and be sure that nobody is on the snowmo bile Never refuel while smoking or while in the vicinity
11. RST90 162 0 mm 6 38 in RST90GT 122 6 mm 4 83 in Maximum hard RS90GT RS9OLTGT 129 0 mm 5 08 in RST90 172 0 mm 6 77 in RST90GT 132 6 mm 5 22 in Distance A changes 1 5 mm 0 06 in with each full turn of the adjusting nut 3 Tighten the locknut to the specified torque NOTICE Always tighten the locknut against the adjusting nut and then tighten the locknut to the speci fied torque ecsoose0 Tightening torque Locknut 42 Nm 4 2 m kgf 30 ft Ibf ESU10926 Adjusting the damping forces of the front shock absorbers RS90GT RS90LTGT RST90GT EWS00740 The damping forces of the left and right shock absorbers must be adjusted to the same settings Uneven settings can cause poor handling and loss of stability Compression damping force The compression damping force of each shock absorber can be adjusted by turning its compression damping force adjusting knob To increase the compression damping force turn the adjusting knob in direction a To de crease the compression damping force turn the adjusting knob in direction b 1 Compression damping force adjusting knob Compression damping setting Minimum soft 12 click s in direction b Standard RS90GT RS9OLTGT 7 RST9OGT 6 click s in direction b Maximum hard 2 click s in direction b With the adjusting knob fully turned in direction a Rebound damping force The rebound damping force of each shock abso
12. Slide rail suspension Rear shock absorber damping force remote adjusting dial ast so arwWN Oo RST90 10 12 1 2 3 4 20 5 nad Description 78 9 10 11 12 13 14 Battery Main fuse Air filter Oil filler cap Fuse box Coolant reservoir Passenger grip warmer switch Passenger grip Backrest Storage compartment Storage pouch RST90GT Tool kit Tail brake light Tow hitch bracket Slide rail suspension 16 Drive track 17 V belt holder 18 Solo touring storage area RST90 19 Rear carrier RST90 20 Throttle stop screw RST90 Description RS90GT RS9OLTGT 12 3 78 12 6 11 RST90 RST90GT 1 2 412 758 1 23 6 78 1 Brake lever 8 Throttle lever 2 Parking brake lever 9 Main switch 3 Grip thumb warmer adjusting switch 10 Shift lever RS90GT RS9OLTGT RST90GT 11 Auxiliary DC jack 4 Grip warmer adjusting switch RST90 12 Headlight beam switch 5 Thumb warmer adjusting switch RST90 13 Shroud latch RST90 6 Helmet shield heater jack RS90GT 14 Starter choke lever RST90 RS9OLTGT RST90GT 7 Engine stop switch TIP e The snowmobile you have purchased may differ slightly from those shown in the figures of this manual e Design and specifications are subjected to change without notice 10 ESU13740 Main switch The main switch controls the ignition and lighting systems The various positions are
13. YAMAHA a OWNER S MANUAL d this manual carefully operatin os nu Een RS90GTA RSSOLTGTA RST90A RST90GTA LIT 12628 02 95 8JA 28199 11 ESU10041 WARNING The engine exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm YAMAHA LIT CALIF 65 01 A Read this manual carefully before operating this vehicle This manual should stay with this vehicle if it is sold ESU10121 Congratulations on your purchase of a Yamaha snowmobile This model is the result of Yamaha s vast experience in the produc tion of fine sporting and touring snowmobiles It represents the high degree of craftsmanship and reliability that have made Yamaha a lead er in these fields This manual will give you an understanding of the operation inspection and basic mainte nance of this snowmobile If you have any questions concerning the operation or main tenance of your snowmobile please consult a Yamaha dealer Yamaha continually seeks advancements in product design and quality Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your snowmobile and this manual If there is any question concerning this manual please consult a Yamaha dealer EWS00670 Please read this manual carefully before operating this snowmobile Do not attempt to oper
14. 23 Headlight beams adjusting 107 Headlight bulb replacing ee 103 Helmet shield heater jack RS90GT RS9OLTGT RST90GT 25 High beam indicator light 16 High altitude settings 77 l Identification numbers 125 L Location of the important labels 1 Low coolant temperature indicator light 17 Lubrication 54H eae tes die 102 M Main Switch s c 2 cngs a 11 Multi function meter unit 13 O Oil level warning indicator 0 e 21 P Parking brake lever 26 Part locations 8 Passenger footrests RST90 RST90GT 30 Passenger grip warmer switch RST90 RSTIOGT 29 Passenger grips RST90GT 29 Periodic maintenance chart for the emission control system 59 Pre operation check list 46 R Rear storage area and rear carrier 33 Riding your snowmobile essere 50 S Safety information 6 Self diagnosis device ccceeeeeeeeees 22 Shift I Ver ssss2 sauce Marcelo eee 26 Shock absorber rear adjusting compression damping force RSTIOGT 5m near ann 42 Shock absorber rear adjusting rebound damping force RS9OGT RSQOLTGT eee 42 Shock absorber rear adjusting spring preload RS90GT RS9OLTGT 40 Shock absorbers front adjusting damping forces RS90GT RS9OLTGT RST90GT 38 Sh
15. Do not use strong cleaners or hard sponges as they will cause dulling or scratching Some cleaning com pounds for plastic may leave scratches on the windshield Test the product on a small hidden part of the windshield to make sure that it does not leave any 120 marks If the windshield is scratched use a quality plastic polishing com pound after washing Lubrication Lubricate moving parts suspension linkage and pivot points Use the grease or lubricant specified in the MAINTENANCE section or Yamaha Lube Zall general purpose lubricant Proper lubrication fights corrosion while it re duces friction Fuel system RS90GT RS9OLTGT RST90GT Add Yamaha Fuel Stabilizer and Conditioner or an equivalent stabilizer to the fuel tank to help prevent fuel oxidation and gum and var nish deposits and to inhibit corrosion in the fuel system and injectors In areas where ox ygenated fuel gasohol is used consult a Yamaha dealer Fuel system RST90 Add Yamaha Fuel Stabilizer and Conditioner or an equivalent stabilizer to the fuel tank to help prevent fuel oxidation and gum and var nish deposits and to inhibit corrosion in the fuel system and carburetor In areas where oxygenated fuel gasohol is used completely drain the fuel system Consult a Yamaha dealer if further information is needed Engine Proper storage of the engine is essential to prevent costly rust and corrosion damage to internal engine components This
16. ESU14181 Replacing a headlight bulb RS90GT RS90LTGT 1 Remove the top cover See page 63 for removal procedures 2 Remove the screws and then remove the headlight access panel 103 Periodic maintenance and adjustment 1 Bulb holder 6 Install a new bulb and then hook the bulb holder onto the headlight unit NOTICE Keep oil and your hands away from the glass part of the bulb or its life and illumination will be affected If the glass is oil stained thoroughly clean it with a cloth moistened with alcohol or lacquer thinner tecsoos21 1 Screw 2 Headlight access panel 3 Disconnect the headlight coupler 4 Remove the bulb holder cover 1 Do not touch the glass part of the bulb Bulb type Halogen bulb 7 Install the bulb holder cover and then connect the headlight coupler Install the headlight access panel and then install the screws 5 Unhook the bulb holder and then remove 9 Install the top cover the burnt out bulb RST90 1 Headlight coupler 2 Bulb holder cover co 1 Open the shroud 2 Disconnect the headlight coupler 3 Remove the bulb holder cover 104 Periodic maintenance and adjustment Headlight coupler 1 Do not touch the glass part of the bulb Bulb holder cover Bulb type Unhook the bulb holder and then remove Halogen bulb the burnt out bulb 6 Install the bulb holder cover and then connect the headlight coupler 7 Close the shroud
17. EWS00251 Driving across the face of a slope side hilling can lead to overturn or loss of control if proper techniques are not used Follow these instructions to reduce your risk of an accident Do not try steeper or more difficult inclines until you have de veloped your skill on gentle slopes Traversing a slope requires you to properly position your weight to maintain proper bal ance As you travel across the slope lean your body to position your weight towards the uphill side A recommended riding position is to kneel with the knee of your downhill leg on the seat and the foot of your uphill leg on the running board This position will make it easi er for you to shift your body weight as needed A Operation Snow and ice are slippery so be prepared for the possibility that your snowmobile could be gin to slip sideways on the slope If this hap pens steer in the direction of the slide if there are no obstacles in your path As you regain proper balance gradually steer again in the direction you wish to travel If your snowmobile starts to tip steer down the hill to regain balance WARNING If you are unable to maintain correct balance and your snowmobile is going to tip over dismount your snowmobile immediately on the uphill side to avoid being hit or caught under the snowmobile as it tips over Ewsoo261 Ice or icy surface EWS00270 When you have to operate on ice or icy surfaces drive slo
18. Locknut tightening torque 59 Nm 5 9 m kgf 43 ft Ibf 7 Recheck alignment and deflection If nec essary repeat steps 3 to 6 until the prop er adjustment is achieved 1 Forward 8 Lower the snowmobile to the ground Gap 9 Tighten the rear axle nut 3 Slide runner 4 Drive track Rear axle nut tightening torque 5 Slide metal 75 Nm 7 5 m kgf 54 ft Ibf Adjusting the drive track alignment and de flection RST90 RST90GT 1 Loosen the rear axle nut 100 Periodic maintenance and adjustment Rear axle nut Lift the rear of the snowmobile onto a suit able stand to raise the drive track off the ground Start the engine and rotate the drive track AON Shifted to right Forward Gap Slide runner Drive track 5 Slide metal one or two turns Stop the engine 4 Align the drive track by turning the left Shifted to left and right adjusting nuts 3 Drive track Shifted to A S alignment right Shifted to left De Left adjusting nut Turn out Turn in 2 Right adjust Turn in Turn out ms ing nut iz 5 1 Forward 2 Gap 3 Slide runner 4 Drive track 5 Slide metal 5 Adjust the drive track deflection to speci fication NOTICE The right and left ad justing nuts should be turned an equal amount tecsoos92 1 Left adjusting nut 2 Right adjusting nut Less than specified More than specified Drive track deflection Left adjusting
19. RST90 TUNE UP SPECIFICATIONS DRIVE 1 CHAIN CASE OIL QTY 250 cm 8 5 oz 2 CHAIN CASE OIL TYPE GL 3 75W or 80W 3 TRACK TENSION 30 35 mm 1 18 1 38 in 100 N 10 kg 22 Ib FOR MORE INFO SEE SERVICE MANUAL FOR THIS EL MODI SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 8 RST90GT TUNE UP SPECIFICATIONS DRIVE 1 CHAIN CASE OIL Q TY 2 CHAIN CASE OIL TYPE 250 cm 8 5 oz GL 3 75W or 80W 3 TRACK TENSION 20 25 mm 0 79 0 98 in 100 N 10 ka 22 Ib FOR MORE INFO SEE SERVICE MANUAL FOR THIS SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE SPECIFICATIONS DE LA MISE AU POINT ENTRAINEMENT T CAPACIT D HUILE DU CARTER DE CHA NE n 250 2 TYPE D HUILE DU CARTER DE CHA NE 3 FL CHE DE LA CHENILLE 30 35 mm 100 N 1049 POUR PLUS DE DETAIL VOIR LE MANUEL D ATELIER POUR CE MOD LE LES CARACTERISTIQUE TECHNIQUES SONT SUSCEPTIBLES DE CHANGER SANS NOTIFICATION PREALABLE BES 47578 00 SPECIFICATIONS DE LA MISE AU POINT ENTRA NEMENT 1 CAPACIT D HUILE DU CARTER DE CHA NE 250 cms 2 TYPE D HUILE DU CARTER DE CHA NE x GL 3 75W or 80W 3 FL CHE DE LA CHENILLE 99 25 mm 100 N 10 Ka POUR PLUS DE D TAIL VOIR LE MANUEL D ATELIER POUR CE MOD LE LES CARACT RISTIQUE TECHNIQUES SONT SUSCEPTIBLES DE CHANGER SANS NOTIFICATION PR ALABLE SHF 47578 00 This spark ignition system meets all requirements of the Canadian Interference Causing Equipment Regulations Ce sys
20. above Engine overheats e Insufficient coolant Add coolant e Air in cooling system Bleed cooling system or ask a Yamaha dealer to check e Leaking coolant Ask a Yamaha dealer to check Snowmobile does not move e Malfunctioning V belt clutch Ask a Yamaha dealer to check e Drive track does not move Foreign object is caught in drive track or slide runners have melted to slide metal due to lack of lubrica tion e Tight loose or broken drive chain Ask a Yamaha dealer to check V belt twists e Improper V belt Replace with correct V belt e Incorrect V belt clutch offset Ask a Yamaha dealer to check Troubleshooting e Loose or broken engine mount s Ask a Yamaha dealer to check V belt slips or becomes extremely hot e Oily or dirty V belt or primary and second ary sheave assembly surfaces Clean e Problem with driveline See V belt twists above Engine does not upshift or downshift properly or engages harshly e Worn or damaged V belt Replace V belt or ask a Yamaha dealer to check e Incorrect V belt clutch settings for altitude or conditions Ask a Yamaha dealer to check e Worn or sticking primary sheave assembly Ask a Yamaha dealer to check e Worn or sticking secondary sheave assem bly Ask a Yamaha dealer to check Noise or excessive vibration in drive chain and sprockets e Broken V belt clutch components Ask a Yamaha dealer to check e Worn or damaged bearings Ask a Yamaha de
21. and apply the parking brake Remove the shroud and the right side cover RS90GT RS9OLTGT RST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures Remove the dipstick wipe it off with a clean rag and then insert it back into the filler hole RS90GT RS90LTGT RST90GT 1 Dipstick RST90 Dipstick Remove the dipstick and check that the oil is between the maximum and mini mum level marks on the REVERSE side of the dipstick If the oil is below the minimum level mark add sufficient oil of the recommended type to raise it to the maximum level mark NOTICE Make sure that no foreign material enters the drive chain housing tecsoos31 1 Maximum level mark 2 Minimum level mark 91 Periodic maintenance and adjustment Recommended drive chain oil SAE 75W or 80W API GL 3 Gear oil 5 Install the dipstick making sure to align the notch in the dipstick handle with the projection on the drive chain housing 1 Notch 2 Projection 6 Install the right side cover and the shroud RS90GT RS9OLTGT RST90GT or close the shroud RST90 To adjust the chain tension 1 Remove the shroud and the right side cover RS90GT RS9OLTGT RST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 2 Loosen the locknut 3 Turn the chain tension adjusting bolt clockwise
22. and then turn it off Remove the shroud the right side cover and the top cover RS90GT RS9OLTGT RST90GT or open the shroud and remove the right side cover RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures Remove the screws and then pull the right lower cover outward to remove it RS90GT RS9OLTGT RST90GT 79 Periodic maintenance and adjustment RS90GT RS90LTGT RST90GT RST90 1 Screw 1 Oil level gauge coupler 2 Right lower cover 2 Oil filler cap 5 Remove the bottom panel by removing 8 Remove the oil filler cap and the cylinder the bolts head cap and then remove the engine oil drain bolt and its gasket to drain the oil from the oil tank RS90GT RS90LTGT 1 Bolt 2 Bottom panel Se 1 Cylinder head cap RST90 6 Place an oil pan under the oil tank to col lect the used oil 7 Disconnect the oil level gauge coupler RS90GT RS90LTGT RST90GT 1 Cylinder head cap 1 Oil level gauge coupler 2 Oil filler cap 80 Periodic maintenance and adjustment RST90GT 1 Cylinder head cap RS90GT RS9OLTGT RST90GT 1 Engine oil drain bolt oil tank 2 Gasket RST90 1 Engine oil drain bolt oil tank 2 Gasket 9 Place an oil pan under the engine to col lect the used oil 10 Remove the engine oil drain bolt and its gasket to drain the oil from the crank
23. case QUEZ 1 Engine oil drain bolt crankcase 2 Gasket 3 VY mark TIP e A 7 mark is stamped on the crankcase near the engine oil drain bolt for easy iden tification e Dispose of used oil according to local regu lations e Skip steps 11 13 if the oil filter cartridge is not being replaced 11 Remove the oil filter cartridge with an oil filter wrench 1 Oil filter cartridge TIP An oil filter wrench is available at a Yamaha dealer 12 Apply a thin coat of engine oil to the O ring of the new oil filter cartridge 81 Periodic maintenance and adjustment 1 O ring TIP Make sure that the O ring is properly seated 13 Install the new oil filter cartridge with an oil filter wrench and then tighten it to the specified torque Tightening torque Oil filter cartridge 17 Nm 1 7 m kgf 12 ft Ibf 14 Install the engine oil drain bolts and their new gasket and then tighten the bolts to the specified torques Tightening torques Engine oil drain bolt crankcase 10 Nm 1 0 m kgf 7 2 ft lbf Engine oil drain bolt oil tank 16 Nm 1 6 m kgf 12 ft Ibf 15 Add 2 0 L 2 11 US qt 1 76 Imp qt of the recommended engine oil to the oil tank and then install and tighten the oil filler cap and the cylinder head cap Recommended engine oil See page 122 16 Start the engine
24. described below 2 Vie 4 1 Off 2 On 3 Start Off The ignition circuit is switched off The key can be removed only in this position On The ignition circuit is switched on Start The starting circuit is switched on The starter motor cranks the engine NOTICE Release the switch immediately after the engine starts 0500021 TIP e RS90GT RS90LTGT RST90GT The headlights and taillight come on after the engine is started e RST90 The headlights meter lighting and taillights come on after the engine is start ed ESU10301 Starter choke lever RST90 Use the starter choke lever when starting and warming up a cold engine Control functions 1 Starter choke lever TIP Refer to the Starting the engine section on page 48 for proper operation 1 When starting a cold engine 2 Warming up 3 When the engine is warm ESU10312 Throttle lever Once the engine is running cleanly squeez ing the throttle lever will increase the engine speed and cause engagement of the drive train Regulate the speed of the snowmobile by varying the throttle position Because the throttle is spring loaded the snowmobile will decelerate and the engine will return to idle when it is released 11 Control functions 1 Throttle lever ESU13750 Throttle override system T O R S EWS00041 ee If the T O R S is activated make sure that the cause of the malfunction has been c
25. turn the adjusting ring in direction a To decrease the spring pre load and thereby soften the suspension turn the adjusting ring in direction b 1 Spring preload adjusting ring Spring preload setting Minimum soft 1 Standard 4 Maximum hard 7 TIP The spring preload can be further adjusted by changing the position of the spring seat Have a Yamaha dealer make this adjustment as it requires special tools ESU13094 Adjusting the 2 up adjusting blocks RST90 EWS00760 Make sure that the 2 up adjusting blocks are installed in the same position on both sides of the snowmobile otherwise poor handling and loss of stability may result The spring force can be adjusted by changing the position of the 2 up adjusting blocks Control functions 2 QY Cw f 1 2 up adjusting block TIP e Be sure to make this adjustment when there is no load rider or cargo on the snowmobile e Use the special tools included in the own ers tool kit to make the adjustment 1 Insert the special tools into the 2 up ad justing block as shown 2 up position rider and passenger Solo rider position Special tool Lock pin RWOhND 2 Pull the lock pin and turn the special tools to change the block position Release the lock pin 4 Remove the special tools from the 2 up adjusting block co 41 Control functions ESU14010 Adjusting the rebound damp
26. 8 Install the top cover RST90 RST90GT To check the coolant level 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud and the right side cover RST90GT or open the shroud RST90 See page 63 RST9OGT or page 67 RST90 for the procedures 3 Check the coolant level in the coolant reservoir when the engine is cold If the coolant level is below the COLD LEVEL mark add coolant until it reaches the COLD LEVEL mark See the following section Replenishing the coolant for more details NOTICE If coolant is not available use distilled water or soft tap water instead Do not use hard wa ter or salt water since it is harmful to the engine If water has been used in stead of coolant replace it with cool ant as soon as possible otherwise the cooling system will not be protected against frost and corrosion If water has been added to the coolant have a Yamaha dealer check the antifreeze content of the coolant as soon as pos sible otherwise the effectiveness of the coolant will be reduced tecsoo492 86 1 COLD LEVEL mark RST90GT COOLANT 7 GOLD LEVEL aes 1 COLD LEVEL mark 4 Install the right side cover and the shroud RST90GT or close the shroud RST90 Bleeding the cooling system The cooling system must be bled if the cool ant reservoir becomes empty if air can be seen in the coolant reservoir or if there i
27. RS90GT RS90LTGT RST90GT The multi function meter unit is equipped with the following e a digital speedometer e a tachometer e an odometer e two tripmeters which show the distance traveled since they were last set to zero e a fuel reserve tripmeter which shows the distance traveled since the fuel level warn ing indicator and warning light came on e an oil change tripmeter which shows the distance traveled since the periodic oil change interval was reached e a clock e warning indicators which show engine trouble coolant temperature fuel level and oil level warnings e indicator lights which show high beam and low coolant temperature conditions a warning light which shows warnings to gether with the warning indicators e a fuel meter which shows the fuel remain ing in the fuel tank e a grip thumb warmer level indicator which shows the grip warmer level or the thumb warmer level Control functions e adisplay brightness control function When the key is turned to the on position the tachometer needle makes one sweep and the low coolant temperature indicator light the warning light and all segments of the meter unit display come on and go off 12 3 4 5 LU 6 A mn 7 y 7 P NNB 8 e O oo Wo Ezz roo BBB 1 RESET button 2 SELECT button 3 Tachometer 4 Warning indicators 5 Clock 6 Low coolant temperature indicator
28. RST90GT 1 Remove the shroud and the top cover See page 63 for removal procedures 2 Remove the headlight unit bolt and the windshield stay bolts on each side of the snowmobile Bulb holder Install a new bulb and then hook the bulb holder onto the headlight unit NOTICE Keep oil and your hands away from the glass part of the bulb or its life and illumination will be affected If the glass is oil stained thoroughly clean it with a cloth moistened with alcohol or lacquer thinner ecsoos21 1 Headlight unit bolt 2 Windshield stay bolt 3 Unhook the headlight unit as shown then lift it up and move it forward away from the handlebar NOTICE Be careful not to scratch the snowmobile when mov ing the headlight unit Ecs00920 105 Periodic maintenance and adjustment 7 106 Headlight unit Disconnect the headlight coupler Remove the bulb holder cover Headlight coupler 2 Bulb holder cover 6 Unhook the bulb holder and then remove the burnt out bulb Bulb holder Install a new bulb and then hook the bulb holder onto the headlight unit NOTICE Keep oil and your hands away from the glass part of the bulb or its life and 1 illumination will be affected If the glass is oil stained thoroughly clean it with a cloth moistened with alcohol or lacquer thinner cs0062 Do not touch the glass part of the bulb Bulb type Halogen bulb o Instal
29. above the ground V belt Remove the V belt and store separately Storage Store the snowmobile in a dry well ventilated place out of direct sunlight Put a fabric cover over the snowmobile preferably one that is designed for it Do not use a plastic or vinyl cover condensation could be trapped un derneath which could increase the chances of rusting Returning to service after storage When returning your snowmobile to service install the V belt and battery and adjust the drive track Storage Remove the spark plugs and clean or replace them if necessary Perform all other pre oper ation and seasonal maintenance checks list ed in the periodic maintenance chart TIP Before installing the battery have a Yamaha dealer inspect and fully charge it For peak performance it is recommended that you have your snowmobile checked and tuned by a Yamaha dealer The dealer has the experience and training to help you get the maximum performance and use out of your Yamaha snowmobile 121 Specifications Dimensions Overall length RS90GT 2805 mm 110 4 in RS90LTGT 3000 mm 118 1 in RST90 3135 mm 123 4 in RST90OGT 3185 mm 125 4 in Overall width 1225 mm 48 2 in Overall height RS90GT 1160 mm 45 7 in RS90LTGT 1160 mm 45 7 in RST90 1330 mm 52 4 in RST90GT 1380 mm 54 3 in Weight With oil and fuel RS90GT 296 0 kg 653 Ib RS90LTGT 303 0 kg 668 Ib RST90 331 0 kg 730 Ib RST90GT 336 0 kg 741 Ib S
30. and jumper cables Two connecting leads have been provided for jump starting the snowmobile Due to the rubber engine mount ing the snowmobile frame is not a suitable grounding point for jump starting the engine EWS00570 e Connect the jumper cables only to the connecting lead terminals Do not con nect them to the frame or any wire or other lead e When connecting the jumper cables do not contact the jumper cables or con necting lead terminals to each other or to the frame or any metal part of the snowmobile This can cause electrical system damage or A FIRE HAZARD e Be sure to pull the lead covers back over the terminals completely If the termi nals are exposed they could come into contact with the frame or a metal part of the snowmobile and this can cause elec trical system damage or A FIRE HAZ ARD ECS00650 NOTICE Use the connecting leads to jump start the snowmobile only Do not use the connect ing leads for any other purpose Troubleshooting To start the engine using the booster battery 1 Apply the parking brake and turn the key to the off position 2 Remove the shroud and the right side cover RS90GT RS9OLTGT RST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 3 Remove the red connecting lead from the lead holder and move it away from the black connecting lead NOTICE Be sure to connect the red jumper cable
31. combustion cham ber 1 No fuel in tank Supply fuel J Clogged fuel line Clean fuel line J Clogged injector RS90GT RS90LTGT RST90GT Ask a Yamaha dealer to check Clogged carburetor RST90 Clean carburetor e Fuel supplied to combustion chamber Flooded engine RS90GT RS9OLTGT RST90GT Crank engine or wipe spark plugs dry Flooded engine too much choke RST90 Crank engine with throttle open or wipe spark plugs dry 2 Electrical system e Poor spark or no spark 116 Spark plugs are dirty with carbon or are wet Remove carbon or wipe spark plugs dry Replace if necessary Faulty ignition system Ask a Yamaha dealer to check L T O R S malfunction Disconnect throttle switch connec tors and connect wire harness con nectors together to bypass T O R S WARNING Before bypassing the T O R S make sure that the throt tle returns properly to the fully closed position The T O R S is an important safety device in the case of a malfunction take the snowmobile to a Yamaha dealer immediately for repair tewso0s61 RS90GT RS9OLTGT RST90GT RST90 3 Compression e Insufficient e Loose cylinder head nuts Tighten nuts properly e Worn or damaged gasket Replace gasket e Worn or damaged piston and cylin der Ask a Yamaha dealer to check Discharged battery If the battery is discharged the engine can be started using a fully charged 12 volt battery
32. compo nents and are easy to inspect The condition of the spark plugs can indicate the condition of the engine Check the coloration on the white porcelain insulator around the center electrode The ideal coloration at this point is a medium to light tan color for a snowmobile that is being ridden normally If any spark plug shows a distinctly different color there could be some thing wrong with the engine For example a very white center electrode porcelain color could indicate an intake track air leak or car buretion problem for that cylinder Do not at tempt to diagnose such problems yourself Instead take the snowmobile to a Yamaha dealer for inspection and possible repairs You should periodically remove and inspect the spark plugs because heat and deposits will cause any spark plug to slowly break down and erode Consult a Yamaha dealer before changing to a different type of spark plug Specified spark plug Manufacturer NGK Model CR8E 68 EWS00710 Be sure to use the specified spark plug and spark plug cap Otherwise the T O R S may not work properly Spark plugs are produced in several different thread lengths The thread length or reach is the distance from the spark plug gasket seat to the end of the threaded portion If the reach is too long overheating and engine damage may result If the reach is too short spark plug fouling and poor performance may result Al so if the reach is too short car
33. function to ensure cleaner air but are also vital to proper engine operation and maximum performance In the following periodic maintenance charts the services related to emission control are grouped separately These services require specialized data knowledge and equipment Yamaha dealers are trained and equipped to perform these particular services 58 Periodic maintenance and adjustment ESU11461 Periodic maintenance chart for the emission control system Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools data and technical skills INITIAL EVERY 1 month Seasonally REMARKS or 800 km 500 mi 40 hr 200 hr e Check condition Spark plugs e Adjust gap and clean e Replace if necessary e Check and adjust valve clear Every 40000 km 25000 ance when engine is cold mi Valve clearance e Check breather hose for cracks or damage e Replace if necessary e Check condition e Replace if necessary Crankcase breather system Fuel filter RST90 e Check fuel hose for cracks or Fuel line damage e Replace if necessary Idle speed RST90 Check and adjust idle speed Fuel injection RS90GT e Check synchronization RS90LTGT Adjust if necessary RST90GT e Adjust synchronization e Carburetors Whenever operating RST90 e Adjust the jets condition elevation tem perature is changed e Check fo
34. in vapor lock If the brake fluid level goes down consult a Yamaha dealer ECS00550 NOTICE Brake fluid may deteriorate painted sur faces or plastic parts Never spill any fluid If any is spilled clean it up immediately Place the snowmobile on a level surface and apply the parking brake Check that the brake fluid is above the lower level and replenish when necessary 1 Lower level Specified brake fluid DOT 4 Changing the brake fluid EWS00471 eS Make sure that the brake fluid and the fol lowing parts are replaced by a Yamaha dealer Brake fluid replacement is necessary when the following components are replaced during the periodic maintenance or if they are dam aged or leaking e All oil seals of the master cylinder and cali per cylinder e The brake hose ESU13612 Extrovert drive sprocket RS90GT RS9OLTGT Check the extrovert drive sprocket for wear and damage Replace if necessary To measure the drive sprocket wear 1 Measure 20 mm 0 79 in up from the bot tom of a drive sprocket tooth 2 Measure the drive sprocket tooth width at the height measured in step 1 If the tooth width is less than 13 mm 0 51 in re place the drive sprocket 1 Drive sprocket tooth 2 Measuring point height 20 mm 0 79 in 3 Drive sprocket tooth width ESU12144 Skis and ski runners Check the skis and ski runners for wear and damage Replace if necessary 95 Periodic mai
35. is more im portant in areas where oxygenated fuel gas ohol is used because the alcohol content in the fuel increases the chance for water to en ter the engine Use Yamaha Stor Rite Engine Fogging Oil or an equivalent fogging oil to protect both the combustion chamber and crankshaft from corrosion An alternate meth od is to remove the intake silencer RS90GT RS90LTGT RST90GT or air filter case RST90 and squirt oil into the throttle bodies RS90GT RS9OLTGT RST90GT or carbu retor throats RST90 while the engine is run ning NOTICE Do not simply start the engine when in storage starting the en gine occasionally during the storage peri od can cause more harm than good Moisture and acids form during combus tion which can actually increase the chance for corrosion damage during the storage period tecsooss1 Surface protection Apply a coat of wax to painted surfaces Apply suitable protectants to the exterior of the en gine drive track and to other metal plastic and rubber parts Battery Remove the battery from the snowmobile Store it in a cool dry place that is above 0 C 32 F but less than 30 C 90 F Check the condition of the battery once a month and charge it as necessary NOTICE Always keep the battery charged Storing a dis charged battery can cause permanent bat tery damage tecsoos91 Drive track Loosen the drive track and block up the chas sis so that the track is suspended
36. ity While using your snowmobile e This snowmobile was not manufactured for use on public streets roads or highways Such use is prohibited by law and you could collide with another vehicle e RS90GT and RSYOLTGT are designed to carry the OPERATOR ONLY Passengers are prohibited Carrying a passenger can cause loss of control e Be careful where you ride There may be obstacles hidden beneath the snow Stay on established trails to minimize your expo sure to hazards Ride slowly and cautiously when you ride off of established trails Hit ting a rock or stump or running into wires could cause an accident and injury e This snowmobile is not designed for use on surfaces other than snow or ice Use on dirt sand grass rocks or bare pavement may cause loss of control and may damage the snowmobile e Always ride with other snowmobilers when going on a ride You may need help if you run out of fuel have an accident or damage your snowmobile Safety information e Many surfaces such as ice and hardpacked snow require much longer stopping distanc es Be alert plan ahead and begin deceler ating early The best braking method on most surfaces is to release the throttle and apply the brake gently not suddenly Avoid carbon monoxide poisoning All engine exhaust contains carbon monox ide a deadly gas Breathing carbon monoxide can cause headaches dizziness drowsiness nausea confusion and eventually death C
37. light F 7 High beam indicator light D 8 Warning light A 9 Meter display The grip warmer level is initially displayed for 5 seconds then the display switches to the fuel meter TIP To switch the speedometer odometer and tripmeter displays between kilometers and miles select the odometer mode ODO and then push the SELECT button for at least 10 seconds while the snowmobile is stopped 13 Control functions Odometer and tripmeter modes VE LUI 1 Odometer tripmeter fuel reserve tripmeter Pushing the SELECT button switches the display between the odometer mode ODO and the tripmeter modes TRIP A and TRIP B in the following order ODO TRIP A gt TRIP B ODO If the fuel level warning indicator and warning light come on see page 18 the odometer display will automatically change to the fuel reserve tripmeter mode F TRIP and start counting the distance traveled from that point In that case push the SELECT button to switch the display between the various trip meter and odometer modes in the following order F TRIP ODO gt TRIP A gt TRIP B gt F TRIP To reset a tripmeter select it by pushing the SELECT button and then push the RE SET button for at least 1 second If you do not reset the fuel reserve tripmeter manually it will reset itself automatica
38. made Do not turn the adjusting knob in di rection b more than click s Even if the adjusting knob is continually turned after click s there will be no change in the damping force Be sure to stop the adjust ing knob at a position where there is a Click tecsoo910 1 Compression damping force adjusting knob Compression damping force setting Minimum soft 12 click s in direction b Standard 6 click s in direction b Maximum hard 2 click s in direction b With the adjusting knob fully turned in direction a ESU11046 Adjusting the control rods The weight transfer can be adjusted by turn ing the adjuster on the control rod RS90GT RS90LTGT or the adjusting nuts on the con trol rods RST90 RST90GT RS90GT RS9O0LTGT 1 Check the control rod length using the scale on the special wrench as shown TIP In order to obtain a precise measurement the special wrench corner should touch the con trol rod adjuster and the locknut must be turned so that one of its notches aligns with the wrench allowing the wrench to fit horizon tally on the control rod 1 ued 2 5 Special wrench corner Control rod adjuster Scale range Special wrench Control rod length OC Po Ne Control functions TIP Use the special wrench in the owner s tool kit to make this adjustment 2 Loosen the locknut 3 To increase weight transfer turn the ad juster in dire
39. must be bled if the cool ant reservoir becomes empty if air can be seen in the cooling system or if there is a cooling system leak Consult a Yamaha deal er ECS00500 NOTICE Operating the engine with an improperly bled cooling system can cause overheat ing and severe engine damage Replenishing the coolant 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the top cover See page 63 for removal procedures 3 Remove the coolant reservoir cap fill the reservoir with the recommended coolant and then install the cap 1 Coolant reservoir cap 2 Coolant recovery tank cap Remove the coolant recovery tank cap add the recommended coolant until it reaches the COLD LEVEL mark and then install the cap Recommended antifreeze High quality ethylene glycol antifreeze containing corrosion inhibitors Antifreeze and water mixing ratio 3 2 Total amount RS90GT 5 60 L 5 92 US at 4 93 Imp qt RS9OLTGT 6 10 L 6 45 US qt 5 37 Imp qt Start the engine allow it to idle for several minutes and then turn it off Check for any coolant leakage If coolant is leaking check for the cause 85 Periodic maintenance and adjustment TIP If you find any leaks consult a Yamaha deal er 7 Check the coolant level in the coolant reservoir If it is not full remove the cool ant reservoir cap fill the reservoir with the recommended coolant and then install the cap
40. not sold by Yamaha or modifica tions not specifically recommended by Yamaha even if sold and installed by a Yamaha dealer Maintenance and storage e When laying the snowmobile on its side for maintenance use a suitable stand to keep it in a stable and level position e Do not leave the snowmobile on its left side for an extended period of time Fuel may leak out from the fuel breather hose e Do not allow anyone to stand behind the snowmobile when starting inspecting or adjusting the snowmobile A broken track track fittings or debris thrown by the track could be dangerous to the operator or by standers e Modifications made to the snowmobile not approved by Yamaha or the removal of original equipment may render your snow mobile unsafe for use which may cause se vere personal injury Modifications may also make the snowmobile illegal to use e Never store the snowmobile with fuel in the fuel tank inside a building where ignition sources are present such as hot water and space heaters an open flame sparks clothes dryers and the like Allow the en gine to cool off before storing the snowmo bile in an enclosed space Description ESU10261 nb e k RS90GT 1 2 3 4 5 6 7 8 9 10 RS90LTGT 12 Battery 13 Drive track Main fuse 14 V belt holder Air filter Oil filler cap Fuse box Coolant reservoir Coolant recovery tank Storage compartment Tool kit Tail brake light
41. nut Right adjust ing nut Turn in Turn out Turn out Turn in 101 Periodic maintenance and adjustment 6 Recheck alignment and deflection If nec essary repeat steps 3 to 5 until the prop er adjustment is achieved 7 Lower the snowmobile to the ground 8 Tighten the rear axle nut Rear axle nut tightening torque 75 Nm 7 5 m kgf 54 ft Ibf Slide runners Check the slide runners for wear and dam age If the slide runners reach the wear limit they should be replaced 1 Slide runner 2 Wear limit height Slide runner wear limit height 10 5 mm 0 41 in ECS00350 NOTICE Ride on fresh snow frequently Operating on ice or hard packed snow will rapidly wear the slide runners ESU12198 Lubrication Lubricate the following points with the speci fied grease 102 EWS00511 Do not grease the throttle cable because it could become frozen which could cause loss of control Apply a dab of grease onto the cable end only TIP For parts equipped with a grease nipple use a grease gun Lubricants Brake lever Silicone grease Other lubrication points Low temperature grease 1 Throttle cable end Periodic maintenance and adjustment j RS90LTGT 1 Grease nipple RST90 1 Grease nipple RS90GT 1 Grease nipple RST90GT 1 Grease nipple 1 Grease nipple
42. quired to prevent engine damage Con sult a Yamaha dealer Gasohol containing methanol is not recommend ed e Make sure that snow or ice does not en ter the fuel tank when refueling e Do not use alcohol deicers or water ab sorbing additives with oxygenated fuel e The fuel tank should be filled with the recommended gasoline The use of oth er gasoline will cause severe damage to internal engine parts such as the valves and piston rings as well as to the ex haust system ESU14001 Suspension The suspension can be adjusted to suit rider preference Softer settings for example may provide greater rider comfort while harder settings may allow more precise handling and control over certain types of terrain or riding conditions Control functions If you are not familiar with suspension adjust ments have a Yamaha dealer make these adjustments EWS00151 Read and understand the following infor mation before handling shock absorbers that contain highly pressurized nitrogen gas e Do not tamper with or attempt to open the cylinder assemblies e Do not subject the shock absorbers to an open flame or other high heat source This may cause the unit to explode due to excessive gas pressure e Do not deform or damage the cylinders in any way Cylinder damage will result in poor damping performance e Do not dispose of a damaged or worn out shock absorber yourself Take the shock absorber to a Yamaha dealer for an
43. rear of the snowmobile The rear storage area can be used only when the passenger seat is removed 1 Carrier lock lever Slide both the backrest and the rear car rier forward until they stop and then re move them 33 Control functions 1 Backrest 1 Hol 2 Rear carrier E 2 Rear carrier 3 Remove the passenger seat lock knob 3 Bolt and then remove the passenger seat 4 Carrier lock bracket stops 1 6 Pull the carrier lock lever up to lock the TA rear carrier in place Then place the lever N 2 under the rear carrier and secure it with V the holder NOTICE When using the t 5 Slide the rear carrier backward until it OD rear storage area do not load any car O go that is too large for it In addition cargo must not project from the edges 1 Passenger seat of the rear storage area ecso0211 2 Passenger seat lock knob 4 Align the holes in the rear carrier with the bolts on the carrier lock bracket and then place the rear carrier on the carrier lock bracket 1 Carrier lock lever To install the passenger seat and backrest 1 Remove the rear carrier Refer to steps 1 2 in the To remove the passenger seat and backrest section 2 Install the passenger seat and then in stall the passenger seat lock knob 34 Align the holes in the backrest bracket with the bolts on the carrier lock bracket and then place the backrest on the carrier lock bracket Bolt
44. self di agnosis device of the snowmobile to warn the rider of any of the above problems If this occurs have a Yamaha dealer inspect the snowmobile as soon as possible RS90GT RS9OLTGT RST90GT rN oN Fali E 38 Fuel level warning indicator jg Warning light A Fuel meter Fuel meter indicator gy SONS ae i e emm om DT ET HR E BAABA 1 Fuel level warning indicator gi 2 Warning light A 3 Fuel meter SD Ge 7 ESU10462 Oil level warning indicator The oil level warning indicator and the warn ing light come on when the engine oil level is low RS90GT RS90LTGT RST90GT 1 Oil level warning indicator 2 Warning light A 1 Oil level warning indicator Ea 2 Warning light A Control functions If the oil level warning indicator and the warn ing light come on place the snowmobile on a level surface and allow it to idle for one minute If the oil level warning indicator and the warn ing light go off the engine oil level is sufficient however it is getting low Add engine oil as soon as possible If the oil level warning indicator and the warn ing light do not go off check the engine oil lev el in the oil tank see page 77 for engine oil level checking procedures and add eng
45. the shroud ECS00372 NOTICE e Make sure that all cables hoses and leads are routed properly before install ing the shroud and covers e When installing the shroud and covers be sure to tighten the fasteners secure ly ESU13962 Opening and closing the shroud and removing and in stalling the right side cover RST90 EWS00810 Be sure the shroud and right side cover are secured before operation A loose shroud or cover could move and cause loss of control Shroud To open the shroud Unhook the shroud latches and then slowly raise the shroud forward until it stops 1 Shroud latch 2 Shroud To close the shroud Slowly lower the shroud to its original position and then hook the shroud latches Right side cover To remove the right side cover 1 Open the shroud See the above proce dure 2 Remove the screws and bolts and then remove the right side cover 3 Right side cover To install the right side cover 1 Place the right side cover in the original position and then tighten the bolts and screws 2 Close the shroud 67 Periodic maintenance and adjustment ECS01040 NOTICE e Make sure that all cables leads and hoses are routed properly before clos ing the shroud and installing the right side cover e When installing the right side cover be sure to tighten the bolts and screws se curely ESU11784 Checking the spark plugs The spark plugs are important engine
46. until it is finger tight and then loosen it 1 4 turn 92 1 Locknut 2 Chain tension adjusting bolt 4 While holding the chain tension adjusting bolt with a wrench tighten the locknut to the specified torque Tightening torque Locknut 25 Nm 2 5 m kgf 18 ft Ibf 5 Install the right side cover and the shroud RS90GT RS9OLTGT RST90GT or close the shroud RST90 ESU13932 Brake and parking brake EWS00440 e A soft spongy feeling in the brake lever indicates a failure in the brake system e Do not operate the snowmobile if you find any problems in the brake system You could lose braking ability which could lead to an accident Ask a Yamaha dealer to inspect and repair the brake system ECS00060 NOTICE Make sure that the brake lever end does not project out over the handlebar end This will help prevent brake lever damage when the snowmobile is placed on its side for service Periodic maintenance and adjustment Test the brake at a low speed when starting out to make sure that it is working properly If the brake does not provide proper braking performance inspect the brake for wear or brake fluid leakage See the following section for more details Checking the brake pads Check the brake pads for wear according to the following procedure 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud and the right side cover RS90GT RS9OLTGT R
47. warranty registration identification your name and new mailing address Mail to YAMAHA MOTOR CORPORATION U S A WARRANTY DEPARTMENT P O Box 6555 Cypress California 90630 This will ensure that Yamaha Motor Corporation U S A has an up to date registration record in accordance with federal law 129 Consumer information ESU12510 YAMAHA EXTENDED SERVICE Y E S Keep your Yamaha protected even after your warranty expires with genuine Yamaha Extended Service Y E S e Y E S is designed and administered by Yamaha Motor Corporation to provide maxi mum owner satisfaction You get uninter rupted factory backed coverage for extra peace of mind e Y E S is flexible You choose the plan that s right for you 12 months 24 months 36 months or every 48 months on selected models beyond your warranty period e Y E S is designed and administered by the same Yamaha people who handle your war ranty and it shows in the comprehensive coverage benefits There are no mileage limi tations and Y E S covers manufacturing defects just like the warranty See the sample contract at your Yamaha dealer to see how comforting uninterrupted factory backed pro tection can be e You don t have to pay anything for covered repairs There s no deductible to pay and repairs aren t pro rated You don t have any out of pocket expenses for covered repairs e In addition Travel and Recreation Interruption Pro
48. 1 Brake lever TIP When the brake lever is squeezed the brake light comes on ECS00060 NOTICE Make sure that the brake lever end does not project out over the handlebar end This will help prevent brake lever damage when the snowmobile is placed on its side for service RS90GT RS90LTGT The brake lever is equipped with a position adjuster To adjust the brake lever position 1 Loosen the locknut 2 While lightly pushing the brake lever in di rection a turn the adjusting bolt to set the brake lever to the desired position 25 Control functions ihe p 2 1 Locknut 2 Adjusting bolt 3 Tighten the locknut securely after adjust ing the brake lever position ESU10581 Parking brake lever When parking the snowmobile or starting the engine apply the parking brake by moving the parking brake lever to the left 1 Parking brake lever To release the parking brake move the park ing brake lever to the right 26 ESU10593 Shift lever The shift lever is used to put the snowmobile into forward or reverse After coming to a complete stop pull the shift lever out slide it to FWD or to REV until it stops and then release it RS90GT RS9OLTGT RST90GT 1 Shift lever 1 Pull out 2 Slide to FWD forward 3 Release 1 Pull out 2 Slide to REV reverse 3 Release RST90 Wye Me Ole AZ 1 Shift lever 1 Pull out
49. 107 Periodic maintenance and adjustment 1 Phillips screwdriver 3 Close the shroud ESU12290 Fittings and fasteners Check the tightness of the fittings and fasten ers Tighten in proper sequence and torque if nec essary ESU14020 Battery The battery is located under the air filter case See page 109 This model is equipped with a VRLA Valve Regulated Lead Acid battery There is no need to check the electrolyte or to add distilled water However the battery lead connections need to be checked and if necessary tight ened EWS00540 Battery electrolyte is poisonous and dan gerous It contains sulfuric acid and can cause severe burns Avoid contact with skin eyes or clothing ANTIDOTE e EXTERNAL Flush with water e INTERNAL Drink large quantities of wa ter or milk Follow with milk of magne sia beaten egg or vegetable oil Call physician immediately e EYES Flush with water for 15 minutes and get prompt medical attention 108 Batteries produce explosive gases Keep sparks flame cigarettes etc away Venti late when charging or using in an en closed space Always shield your eyes when working near batteries KEEP OUT OF THE REACH OF CHILDREN Charge or have a Yamaha dealer charge the battery as soon as possible if it seems to have discharged Keep in mind that the battery tends to discharge more quickly if the snow mobile is equipped with electrical accesso ries EWS00610
50. 2 Slide to FWD forward 3 Release Control functions 1 Pull out 2 Slide to REV reverse 3 Release ECS00072 NOTICE Do not use the shift lever while the snow mobile is moving otherwise the drive train could be damaged ESU14092 Drive guard EWS00402 e Coming in contact with the rotating V belt or clutch parts can cause severe in jury or death Never run the engine with the drive guard removed e Make sure that the drive guard is in stalled securely before operating the snowmobile to protect against severe injury or death from a broken V belt or other part should it come off the snow mobile while it is in operation ECS00930 NOTICE e Never run the engine with the V belt re moved Clutch components can be dam aged e Be careful not to scratch the windshield when removing or installing the drive guard 27 Control functions The drive guard is designed to protect the V belt clutch and V belt in case parts break or come loose The drive guard is located behind the left side cover RS90GT RS9OLTGT RST90GT or under the shroud RST90 See page 63 RS90GT RS9YOLTGT RST90GT or page 67 RST90 for information on how to access the drive guard To remove the drive guard 1 Pull out the drive guard locking pin from the drive guard rear holder 1 Drive guard 2 Drive guard locking pin 2 Lift up the rear of the drive guard as shown and then pull the g
51. 212 TIP This model is equipped with e RS90GT RS9YOLTGT RST90GT an en gine oil pressure switch to stop the engine in case an engine oil pressure drop is de tected To start the engine after this system has stopped the engine be sure to place the snowmobile on a level surface and then turn the key in the main switch to the off position and then to the on position Failing to do so will prevent the engine from starting even though the engine will crank when turning the key to the start position If the engine does not start or if it stops again ask a Yamaha dealer to inspect the snow mobile e an engine overheating prevention system which prevents overheating when the en gine is idling When the engine has been idling for 3 minutes or longer and the cool ant temperature has risen above 100 C 212 F the engine automatically stops to prevent overheating The engine can be started after it stops ESU13970 Starting the engine RS90GT RS9OLTGT RST90GT 1 Apply the parking brake 48 Be sure the engine stop switch is in the run position The starter motor cannot be operated when the engine stop switch is in the off position Run position Off position Turn the main switch to the start position and release it when the engine starts NOTICE Release the switch immedi ately after the engine starts If the en gine fails to start release the switch wait a few seconds then try again Each
52. 4111 Tool kit RS90GT RS90LTGT RST90 The owners tool kit is located in the storage compartment See page 31 for information on how to access the storage compartment The service information included in this man ual and the tools provided in the owner s tool kit are intended to assist you in the perfor mance of preventive maintenance and minor repairs However additional tools such as a torque wrench may be necessary to perform certain maintenance work correctly RS90GT RS90LTGT 1 Tool kit RST90 1 Tool kit ECS00360 NOTICE Before starting the engine make sure that the tool kit is properly seated in its holder and is securely fastened 62 TIP If you do not have a torque wrench available during a service operation requiring one take your snowmobile to a Yamaha dealer to check the torque settings and adjust them if necessary RST90GT The owners tool kit is located in the storage pouch See page 31 for information on how to access the storage compartment The service information included in this man ual and the tools provided in the owners tool kit are intended to assist you in the perfor mance of preventive maintenance and minor repairs However additional tools such as a torque wrench may be necessary to perform certain maintenance work correctly ee 1 Tool kit ECS00781 NOTICE Before starting the engine make sure that the tool kit is securely fastened and that the storage pouch zipp
53. 9 US qt 2 90 Imp qt RST90 3 0 L 3 17 US qt 2 64 Imp qt RST90GT 3 3 L 3 49 US qt 2 90 Imp qt Without oil filter cartridge replacement RS90GT 3 1 L 3 28 US qt 2 73 Imp qt RS9OLTGT 3 1 L 3 28 US qt 2 73 Imp qt RST90 2 8 L 2 96 US qt 2 46 Imp qt RST90GT 3 1 L 3 28 US qt 2 73 Imp qt Total amount RS90GT 4 0 L 4 23 US qt 3 52 Imp qt RS9OLTGT 4 0 L 4 23 US qt 3 52 Imp qt RST90 3 7 L 3 91 US qt 3 26 Imp qt RST90GT 4 0 L 4 23 US qt 3 52 Imp qt Brake Type Hydraulic disc type ventilated disc Operation Handle lever left hand operated Throttle Operation Handle lever right hand operated Electrical system Ignition system T C Spark plug Manufacturer NGK Model CR8E Gap 0 7 0 8 mm 0 028 0 031 in Battery Model YTX20L BS Voltage capacity 12 V 18 0 Ah Ten hour rate amperage 1 8 A Bulb voltage wattage x quantity Headlight 12 V 60 55 W x 2 Headlight bulb type Halogen bulb Tail brake light RST90 12 V 5 21W x2 123 Specifications 124 Tail brake light RS90GT LED RS90LTGT LED RST90GT LED Meter lighting RST90 14 V 50 mA x6 Meter lighting RS90GT LED RS90LTGT LED RST90GT LED High beam indicator light RST90 14 V 80 mA x 1 High beam indicator light RS90GT LED RS90LTGT LED RST90GT LED Warning light RS90GT LED RS90LTGT LED RST90GT LED Warning light RST90 14 V 80 mA x 1 Low coolant temperature indicator light RS90GT LED RS90LTGT LED RST90G
54. 9OLTGT RST90GT or Parking brake cable length close the shroud RST90 43 5 46 5 mm 1 713 1 831 in To adjust the parking brake As the parking brake pads wear adjustment may be necessary to ensure proper brake 5 Tighten the parking brake cable locknut 6 Turn the parking brake pad adjusting bolt in or out to adjust the clearance between performance 1 Remove the shroud and the right side the parking brake pads and the brake cover RS90GT RS90LTGT disc RST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 2 Loosen the parking brake pad adjusting bolt locknut and the parking brake pad adjusting bolt Loosen the parking brake cable locknut 4 Turn the parking brake cable adjusting bolt in or out to adjust the cable length 9 Parking brake pad Brake disc Parking brake pad adjusting bolt Parking brake pad adjusting bolt locknut D Parking brake pad to brake disc clear ance a b 1 5 2 0 mm 0 059 0 079 in 7 Tighten the parking brake pad adjusting bolt locknut 94 Periodic maintenance and adjustment 8 Install the right side cover and the shroud RS90GT RS9OLTGT RST90GT or close the shroud RST90 Checking the brake fluid level EWS00460 Be careful that water does not enter the master cylinder when refilling Water will significantly lower the boiling point of the fluid and may result
55. BILE LIMIT ED WARRANTY Yamaha Motor Corporation U S A hereby warrants that new Yamaha snowmobiles purchased from an autho rized Yamaha snowmobile dealer in the continental United States will be free from defects in material and workman ship for the period of time stated herein subject to certain stated limitations WARRANTY PERIOD 1 All Yamaha snowmobiles shall be warranted for a term of one 1 year from the date of purchase plus a special early season extension if applicable 2 All Yamaha snowmobile clutch components are war ranted against abnormal wear for one 1 year from the date of purchase plus a special early season extension if applicable DURING THE PERIOD OF WARRANTY any au thorized Yamaha snowmobile dealer will free of charge repair or replace at Yamaha s option any part adjudged defective by Yamaha due to faulty workmanship or material from the factory Parts used in warranty repairs will be warranted for the balance of the snowmobile s warranty period All parts replaced under warranty be come the property of Yamaha Motor Corporation U S A GENERAL EXCLUSIONS from this warranty shall include any failures to the machine caused by 1 Competition racing or non Yamaha authorized rental use 2 Operation on surfaces other than snow or ice 3 Installation of parts or accessories that are not qual itatively equivalent to genuine Yamaha parts Abnormal strain neglect or abuse Lack of
56. Corporation U S A for clarification or assistance CUSTOMER SERVICE If your machine requires warranty service you must take it to any authorized Yamaha snowmobile dealer within the continental United States Be sure to bring your warranty identification card or other valid proof of the original date of purchase If a question or problem arises regarding warranty first contact the owner of the dealer ship Since all warranty matters are handled at the dealer level this person is in the best position to help you If you are still not satisfied and require additional assistance please write YAMAHA MOTOR CORPORATION U S A CUSTOMER RELATIONS DEPARTMENT P O Box 6555 Cypress California 90630 Consumer information When contacting Yamaha Motor Corpora tion U S A be sure to include the model serial number names dates and receipts CHANGE OF ADDRESS The federal government requires each manufacturer of a motor vehicle to maintain a complete up to date list of all first purchasers against the possibility of a safety related defect and recall This list is compiled from the purchase registrations sent to Yamaha Motor Corporation U S A by the selling dealer at the time of your purchase If you should move after you have purchased your new snowmobile please advise us of your new address by sending a postcard listing your snowmobile model name engine serial number dealer number or dealer s name as it is shown on your
57. ST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 3 Check the brake pads for wear If the brake pads reach the wear limit ask a Yamaha dealer to replace them RS90GT RS90LTGT 1 Brake pad wear limit RST90 RSTI0GT 1 Brake pad wear limit Brake pad wear limit RS90GT 4 7 mm 0 19 in RS9OLTGT 4 7 mm 0 19 in RST90 7 5 mm 0 30 in RST90GT 7 5 mm 0 30 in 4 Install the right side cover and the shroud RS90GT RS9IOLTGT RST90GT or close the shroud RST90 Checking the parking brake pads Check the parking brake pads for wear ac cording to the following procedure 1 Remove the shroud and the right side cover RS90GT RS9OLTGT RST90GT or open the shroud RST90 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 2 Check the parking brake pads for wear by measuring the thickness of the pads If the parking brake pads reach the wear limit ask a Yamaha dealer to replace them 93 Periodic maintenance and adjustment 1 Parking brake pad wear limit 1 Parking brake pad adjusting bolt locknut 2 Parking brake pad adjusting bolt Parking brake pad wear limit 3 Parking brake cable locknut 1 2 mm 0 047 in 4 Parking brake cable adjusting bolt 5 Parking brake cable length 3 Install the right side cover and the shroud RS90GT RS
58. T LED Low coolant temperature indicator light RST90 14 V 80 mA x 1 Consumer information Esu124s1 RS90GT RS90LTGT RST90GT Identification number records Record the frame serial number engine serial number Primary ID and key identification number in the spaces provided for assistance when ordering spare parts from a Yamaha dealer Also record and keep the ID numbers in a separate place in case the snowmobile is sto len Frame serial number The frame serial number is the seventeen digit number stamped on the frame of the snowmobile 1 Engine serial number 1 Frame serial number Key identification number The key identification number is stamped in Engine serial number Primary ID the location as shown The engine serial number is stamped in the location as shown 1 Key identification number 125 Consumer information The Vehicle Emission Control Information la bel is affixed at the location in the illustration This label shows specifications related to ex haust emissions as required by federal law state law and Environment Canada ESU13461 Vehicle Emission Control Infor mation label RS90GT RS9OLTGT 1 Vehicle Emission Control Information label RST90 1 Vehicle Emission Control Information label RST90GT 1 Vehicle Emission Control Information label 126 ESU12500 Consumer information YAMAHA MOTOR CORPORATION U S A SNOWMO
59. T90GT 1 Oil level gauge coupler 2 Oil filler cap RST90 1 Oil level gauge coupler 2 Oil filler cap 5 Remove the oil filler cap wipe the dipstick clean insert it back into the oil filler hole without screwing it in and then remove it again to check the oil level Periodic maintenance and adjustment 1 Oil filler cap 2 Dipstick TIP The engine oil should be between the H and L level marks on the dipstick RS90GT RS90LTGT RST90GT 1 H level mark 2 L level mark RST90 1 H level mark 2 L level mark H 1 6 co If the engine oil is below the L level mark add sufficient oil of the recom mended type to raise it to the H level mark See page 122 for the recommend ed oil NOTICE When adding the en gine oil be careful not to fill above the H level mark on the dipstick Use only the recommended oil See page 122 Make sure that no foreign materi al enters the engine oil tank cs00462 Insert the dipstick into the oil filler hole and then tighten the oil filler cap Connect the oil level gauge coupler Install the right side cover and the shroud RS90GT RS9OLTGT RST90GT or close the shroud RST90 To change the engine oil with or with out oil filter cartridge replacement 1 Place the snowmobile on a level surface and apply the parking brake Start the engine warm it up for several minutes
60. UE DE BLESSURE SERIEUSE OU MEME MORTELLE VEUILLEZ SUIVRE LES RECOMMANDATIONS SUIVANTES Avant dutlser ce v hicule lre le manuel du propri taire et toutes les tiquettes Ce v hicule est une machine haute performance Elle doit tre conduite par un conducteur exp riment Avant de d marrer le moteur v rifier l op ration du frein de l acc l rateur et de la direction Lo frein de s urt da e appliqu ors du d marage Ne pas rouler avec le freir action En Cas d urgence utiliser lap dar du moteur Ne pas ler fier Je moteur an ia cure ou sans son garde Sas que e bouchon du r servoir soi bien referm apr s Je remplissage 2 Ain devier tout risque de colision ne pas rouler sur un chemin pubik Tour porter un eae approve et un amet de motoneige Pr voir une protection pour les Vier Ia postion du leher arc avant ou arid avant teen marche 1 RST90GT 8DM 77761 E0 NOTICE Cleaning with alkaline or acid cleaner gasoline or solvent will damage windshield e Use neutral detergent 8ET 2815K 00 4 amp WARNING AVERTISSEMENT SEVERE INJURY OR DEATH MAY RESULT IF YOU IGNORE ANY OF THE Fi IG THfee tne One s Manual and al labels before operating this vehicle This vehicle is a high performance machine It should be operated by an experienced operator Check throttle brake and steering for proper operation before starting engine Se
61. Vehicle Emission Control Information YAMAHA YAMAHA MOTOR CO LTD PRINTED IN JAPAN 2010 06 0 7x1 CR PRINTED ON RECYCLED PAPER
62. ack deflection RS90GT 30 0 35 0 mm 1 18 1 38 in RS90LTGT 30 0 35 0 mm 1 18 1 38 in RST90 30 0 35 0 mm 1 18 1 38 in RST90GT 20 0 25 0 mm 0 79 0 98 in 3 If the deflection is incorrect adjust the drive track Adjusting the drive track alignment and de flection RS90GT RS9OLTGT 1 Loosen the rear axle nut 1 Rear axle nut 2 Lift the rear of the snowmobile onto a suit able stand to raise the drive track off the ground 3 Start the engine and rotate the drive track one or two turns Stop the engine 99 Periodic maintenance and adjustment 4 Loosen the locknut on the left and the right sides of the snowmobile then align the drive track by turning the adjusting bolt on each side Shifted to left 1 Drive track Shifted to Shifted to left alignment right Left adjusting 2 bolt Turn out Turn in t Right adjust Va ing bolt Turn in Turn out 5 1 Forward 2 Gap 3 Slide runner 4 Drive track 5 Slide metal 5 Adjust the drive track deflection to speci fication NOTICE The right and left ad justing bolts should be turned an equal amount cs00970 1 Left adjusting bolt Drive track More than Less than 5 8 a Jus ing 9 deflection specified specified 2 Right adjusting bolt 3 Locknut a adjusting Turn in Turn out Shifted to right i just g aa la Turn in Turn out 1 9 6 Tighten the locknuts to their specified torque
63. age ECS00820 22 PA A i Wo ii 1 Warning light A 2 Engine trouble warning indicator amp 3 Error code display RST90 1 Warning light A 2 Engine trouble warning indicator amp 3 Error code display ESU10531 Engine stop switch g The engine stop switch is used to stop the en gine in an emergency Simply push the stop switch to stop the engine To start the engine pull the stop switch and proceed with starting the engine See page 48 for engine starting procedures 1 Engine stop switch 8 During the first few rides practice using the stop switch so that you can react quickly in an emergency ESU10661 Headlight beam switch LIGHTS Push the headlight beam switch to change the headlight to high beam HI or to low beam LO 1 Headlight beam switch LIGHTS 2 High beam HI 3 Low beam LO ESU14061 Grip thumb warmer adjusting switch RS90GT RS9OLTGT RST90GT The grip thumb warmer adjusting switch con trols the electrically heated handlebar grips and throttle lever Control functions 1 Grip thumb warmer adjusting switch To raise the temperature To raise the grip warmer temperature press the 8 side of the switch To raise the thumb warmer temperature press the LR side of the switch To
64. akes and rivers that have minimal snow coverage An overheated track will be weakened inter nally which may cause failure or damage Off trail riding Avoid off trail riding until there is sufficient snow coverage It generally takes several feet of snow to provide a good overall base to properly cover debris such as rocks logs etc If snow coverage is not sufficient stay on trails to avoid impact damage to the drive track Studded track In general track life will be shortened when studs are installed Drilling stud holes into the drive track will cut the internal fibers which weakens the track Avoid spinning the drive track Studs may catch on an object and pull out of the track leaving tears and damage around the already weakened area To mini mize possible damage consult your stud manufacturer for installation and stud pattern recommendations Yamaha does not recommend track stud ding ESU11394 Driving EWS00300 Be sure to read the SAFETY INFORMA TION section on page 6 and the Riding your snowmobile section on page 50 carefully before operating the snowmo bile TIP Make sure that the engine is warmed up enough before riding EWS00310 e Make sure that the throttle lever is fully released and the snowmobile is at a full stop before shifting e Be sure to slide the shift lever to FWD or REV until it stops completely and only while the engine is idling e Make sure that th
65. aler to check e Worn or damaged V belt with flat spots Re place e Worn or damaged idler wheels or shafts Ask a Yamaha dealer to check e Worn or damaged drive track Ask a Yamaha dealer to check 119 Storage ESU13940 Long term storage requires some preventive procedures to guard against deterioration Cleaning Thoroughly clean the snowmobile inside and out to remove the corrosive salts and acids that can accumulate Use Yamaha Mud Grease and Engine Cleaner or an equivalent product to loosen mud grease and grime Wash with mild soap then rinse and dry com pletely ECS00870 NOTICE e Improper cleaning can damage plastic parts such as shroud covers wind shields headlight lenses meter lenses etc Use only a soft clean cloth or sponge with mild detergent and water to clean plastic e Do not use any harsh chemical products on plastic parts Be sure to avoid using cloths or sponges which have been in contact with strong or abrasive cleaning products solvent or thinner fuel gaso line rust removers or inhibitors brake fluid antifreeze or electrolyte e Do not use high pressure washers or steam jet cleaners since they cause wa ter seepage and deterioration in the fol lowing areas seals of the slide rail suspension front suspension and brakes electric components couplers connectors instruments switches and lights breather hoses and vents e For snowmobiles equipped with a wind shield
66. ance and adjustment ESU13912 V belt EWS00402 e Coming in contact with the rotating V belt or clutch parts can cause severe in jury or death Never run the engine with the drive guard removed e Make sure that the drive guard is in stalled securely before operating the snowmobile to protect against severe injury or death from a broken V belt or other part should it come off the snow mobile while it is in operation ECS00830 NOTICE Never run the engine with the V belt re moved Clutch components can be dam aged The V belt should be checked before each ride To check the V belt 1 Remove the shroud and the left side cov er RS90GT RS9OLTGT RST90GT or open the shroud RST90 and then re move the drive guard See page 27 for drive guard removal procedures 2 Check the V belt for wear and damage Replace if necessary 1 V belt wear limit 88 New V belt width 34 5 mm 1 36 in V belt wear limit width 32 5 mm 1 28 in 3 Install the drive guard and then install the left side cover and the shroud RS9OGT RS9OLTGT RST90GT or close the shroud RST90 To replace and adjust the V belt Ewso0411 When installing a new V belt make sure that it is positioned properly Otherwise the V belt clutch engagement speed will be changed and the snowmobile may move unexpectedly when the engine is started which could cause an accident ECso0511 NOTICE As the V belt wears the p
67. and adjustment 2 Projection 9 Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover 1 Weatherstrip 10 Install the headlight unit bolts and wind shield stay bolts and then tighten them to their specified torques Tightening torques Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft Ibf Windshield stay bolt 14 Nm 1 4 m kgf 10 ft Ibf 11 Install the top cover and the shroud 72 ESU11863 Checking the throttle override system T O R S EWS00352 When checking the T O R S take precau tions to avoid snowmobile movement which could cause an accident e Make sure that the throttle lever moves smoothly with the engine off before checking the T O R S e Make sure that the parking brake is ap plied e Do not rev the engine to the point that the clutch engages Check the T O R S for proper operation 1 Start the engine TIP Refer to the Starting the engine section on page 48 2 Hold the pivot point of the throttle lever away from the throttle switch by putting your thumb above and forefinger be low between the throttle lever pivot and the engine stop switch housing While holding the pivot point as described above squeeze the throttle lever gradu ally Periodic maintenance and adjustment 1 Throttle lever pivot 2 Engine stop switch housing 3 Throttle lever The T O R S will be activated and the engine spee
68. arbon monoxide is a colorless odorless tasteless gas which may be present even if you do not see or smell any engine exhaust Deadly levels of carbon monoxide can collect rapidly and you can quickly be overcome and be unable to save yourself Also deadly lev els of carbon monoxide can linger for hours or days in enclosed or poorly ventilated areas If you experience any symptoms of carbon monoxide poisoning leave the area immedi ately get fresh air and SEEK MEDICAL TREATMENT e Do not run the engine indoors Even if you try to ventilate engine exhaust with fans or open windows and doors carbon monoxide can rapidly reach dangerous levels e Do not run the engine in poorly ventilated or partially enclosed areas such as barns ga rages or carports e Do not run the engine outdoors where en gine exhaust can be drawn into a building through openings such as windows and doors Genuine Yamaha Accessories Choosing accessories for your snowmobile is an important decision Genuine Yamaha Ac cessories which are available only from a Yamaha dealer have been designed tested and approved by Yamaha for use on your snowmobile Many companies with no con nection to Yamaha manufacture parts and ac cessories or offer other modifications for Yamaha vehicles Yamaha is not in a position to test the products that these aftermarket companies produce Therefore Yamaha can neither endorse nor recommend the use of accessories
69. ate this snowmobile until you have attained adequate knowledge of its con trols and operating features Regular inspections and careful mainte nance along with good operating tech niques will help ensure that you safely enjoy the capabilities and reliability of this snowmobile Introduction RS90GTA RS90LTGTA RST90A RST90GTA OWNER S MANUAL 2010 by Yamaha Motor Corporation U S A 1st Edition June 2010 All rights reserved Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation U S A is expressly prohibited Printed in Japan P N LIT 12628 02 95 Important manual information ESU10151 Particularly important information is distin guished in this manual by the following nota tions A This is the safety alert symbol It is used to alert you to potential personal injury haz ards Obey all safety messages that follow this symbol to avoid possible injury or death EWS00021 A WARNING indicates a hazardous situa tion which if not avoided could result in death or serious injury ECS00011 NOTICE A NOTICE indicates special precautions that must be taken to avoid damage to the snowmobile or other property TIP A TIP provides key information to make pro cedures easier or clearer Location of the important labels 1 Safety information c ceseeeees 6 Description eeccseseeeeeeseeeeeeeees 8 Control functions ccseeer
70. attempt should be as short as possible to preserve the battery Do not crank the engine more than 10 seconds on any one attempt fecso0331 Operation 1 Start 4 Warm up the engine until it runs smooth ly 5 Be sure the low coolant temperature indi cator light has gone out before operation See page 17 for detailed information about the indicator light RST90 1 Apply the parking brake 2 Be sure the engine stop switch is in the run position The starter motor cannot be operated when the engine stop switch is in the off position 1 Run position 2 Off position 3 Fully open the starter choke lever J 1 Starter choke lever 2 Fully open position cold engine starting 3 Half open position warming engine up 4 Closed position warm engine starting TIP The starter choke lever is not required when the engine is warm Move the starter choke lever to the closed position 4 Turn the main switch to the start position and release it when the engine starts NOTICE Release the switch immedi ately after the engine starts If the en gine fails to start release the switch wait a few seconds then try again Each attempt should be as short as possible to preserve the battery Do not crank the engine more than 10 seconds on any one attempt ecso0331 49 Operation 1 Start 5 Warm up the engine and then close the starter choke lever when the engine runs smoothly 6 Be s
71. blown fuse with one of the proper amperage Fuse box IGN ignition fuse FAN radiator fan fuse S H helmet shield heater jack fuse HEAD headlight fuse SIG signaling system fuse DC auxiliary DC jack fuse Spare fuse Spare fuse Fuel injection system fuse Main fuse i 2 3 1 2 3 4 5 6 7 8 111 Periodic maintenance and adjustment RST90GT Specified fuses Main fuse 40 0A Fuel injection system fuse 10 0A Ignition fuse 15 0 A Radiator fan fuse RS90GT 5 0 A RS9OLTGT 5 0 A Headlight fuse 20 0A Signaling system fuse 7 5A Auxiliary DC jack fuse 3 0A Helmet shield heater jack fuse 3 0A Spare fuses RS90GT RS9OLTGT 20 0 A 15 0 A 10 0 A 7 5 A 5 0 A 3 0 A RST90GT 20 0 15 0 A 10 0 A 7 5 A 3 0 A 1 Fuse box 11 Connect the negative battery lead by in 2 IGN ignition fuse stalling the bolt 3 S H helmet shield heater jack fuse 12 Install the battery cover and then hook HEAR headlight fuse the battery band onto the holder signaling system fuse 13 Install the air filter case by reversing the 6 DO auxiliary DC jack fuse 7 Spare fuse removal steps eae l 14 Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay 2 Projection 112 Periodic maintenance and adjustment 15 Fit the weatherstrip on the headlight un
72. bon will form on the exposed threads resulting in combustion chamber hot spots and thread damage Al ways use a spark plug with the specified reach Spark plug reach 19 0 mm 0 75 in 1 Spark plug gap 2 Spark plug reach Before installing any spark plug measure the spark plug gap with a wire thickness gauge and adjust to specification Spark plug gap 0 7 0 8 mm 0 028 0 031 in Periodic maintenance and adjustment When installing the spark plug always clean the gasket surface Wipe off any grime from the threads and tighten the spark plug to the specified torque Spark plug tightening torque 13 Nm 1 3 m kgf 9 4 ft Ibf ECS00382 NOTICE Make sure that the spark plug caps are se curely installed Otherwise the spark plug caps could be damaged due to engine vi bration ESU11795 Adjusting the engine idling speed RST90 1 Place the snowmobile on a level surface and apply the parking brake 2 Start the engine and warm it up TIP Refer to the Starting the engine section on page 48 3 Open the shroud 4 Turn the throttle stop screw in or out to adjust the engine idling speed 1 Throttle stop screw ESU14071 Adjusting the throttle lever free play RS90GT RS9OLTGT 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud the left and right side covers and the top cover See page 63 for removal procedures 3 Remove the headligh
73. ction a and to decrease weight transfer turn it in direction b WARNING Never adjust the control rod beyond the range of the scale on the special wrench otherwise the con trol rod could be damaged which could lead to an accident or injury EWS00181 1 2 ER b AZ 1 Locknut 2 Control rod adjuster 4 Tighten the locknut while holding the ad juster in place TIP Make sure that the special wrench is securely fitted on the locknut 43 Control functions 1 Special wrench Locknut tightening torque 35 Nm 3 5 m kgf 25 ft Ibf RST90 RST90GT EWS00770 The left and right adjusting nuts must be set to the same position Uneven settings can cause poor handling and loss of sta bility 1 Locknut 2 Control rod adjusting nut 1 Loosen the locknut while holding the ad justing nut 2 To increase weight transfer turn the ad justing nut in direction a and to de crease weight transfer turn it in direction b WARNING Never adjust the con trol rods beyond the maximum set ting indicated by red paint otherwise they could be damaged which could lead to an accident or injury tewsoo173 Control functions Locknut Control rod adjusting nut Standard position Adjustable range Red paint area akwnrd 3 Tighten the locknut while holding the ad justing nut in place NOTICE Always tighten the locknut against the adjust ing nut and then tighten the lock
74. d so as to conform at the time of sale with all U S emissions standards applicable at the time of manufacture and that it is free from defects in materials and workmanship which would cause it not to meet these standards within the period listed immediately below Failures other than those resulting from defects in material or workmanship which arise solely as a result of owner abuse and or lack of proper mainte nance are not covered by this warranty All Models Thirty 30 months from the original purchase date 127 Consumer information YAMAHA MOTOR CORPORATION U S A MAKES NO OTHER WARRANTY OF ANY KIND EXPRESSED OR IMPLIED ALL IMPLIED WAR RANTIES OF MERCHANTABILITY AND FIT NESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND TIME LIM ITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPO RATION U S A AND EXCLUDED FROM THIS WARRANTY SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU ALSO EXCLUDED FROM THIS WARRANTY ARE ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING LOSS OF USE SOME STATES DO NOT AL LOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAM AGES SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LE GAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE SPECIAL EARLY SEASON WARRANTY EX TENSION A special warranty extension is availab
75. d will be limited to less than the clutch engagement speed See page 122 for the clutch engagement speed WARNING If the engine speed does not decrease to less than the clutch engagement speed stop the engine by turning the main switch to the off position and consult a Yamaha dealer Operating the snowmobile with a mal functioning T O R S could result in loss of control tewsoo362 ESU14081 RS90GT RS90LTGT t Place the snowmobile on a level surface and apply the parking brake Remove the shroud the left and right side covers and the top cover See page 63 for removal procedures Remove the headlight unit bolt on each side of the snowmobile Headlight unit bolt 4 Unhook the headlight unit as shown then lift it up and move it rearward away from the air filter case cover NOTICE Be careful not to scratch the snowmobile when moving the headlight unit ECS00920 Headlight unit Checking the air filter 5 Remove the air filter case cover by un Check that there is no snow under the air filter element frame after each ride In addition snow may need to be cleaned during a ride depending on the riding conditions hooking the fasteners 73 Periodic maintenance and adjustment 8 Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay 1 Air filter case cover fastener 6 Lift up the air filter element frame and check the air filter el
76. dure al lows any residual pressure to escape 83 Periodic maintenance and adjustment When the hissing sound has stopped press down on the cap while turning coun terclockwise and remove it RS90GT RS90LTGT 1 Coolant reservoir cap RST90GT 1 1 84 Coolant reservoir cap RS90GT RS9OLTGT To check the coolant level Place the snowmobile on a level surface and apply the parking brake 2 Remove the top cover See page 63 for removal procedures Check the coolant level in the coolant re covery tank when the engine is cold If the coolant level is below the COLD LEVEL mark add coolant until it reaches the COLD LEVEL mark See the following section Replenishing the coolant for more details NOTICE If coolant is not available use distilled water or soft tap water instead Do not use hard wa ter or salt water since it is harmful to the engine If water has been used in stead of coolant replace it with cool ant as soon as possible otherwise the cooling system will not be protected against frost and corrosion If water has been added to the coolant have a Yamaha dealer check the antifreeze content of the coolant as soon as pos sible otherwise the effectiveness of the coolant will be reduced Ecsoo492 Periodic maintenance and adjustment 1 Coolant recovery tank 2 COLD LEVEL mark 4 Install the top cover Bleeding the cooling system The cooling system
77. e Pr voir une protection pour les yeux 8HF 77761 E0 5 RS90GT RS90LTGT RST90GT TUNE UP SPECIFICATIONS ENGINE 1 SPARK PLUG CR8E NGK 2 SPARK PLUG GAP 3 IDLE SPEED 1300 50 r min 5 RST90 TUNE UP SPECIFICATIONS ENGINE 1 SPARK PLUG 2 SPARK PLUG GAP 3 IDLE SPEED 1400 100 r min 7 RST90 8ES 14427 00 0 7 0 8 mm 0 028 0 031 in CR8E NGK 0 7 0 8 mm 0 028 0 031 in SPECIFICATIONS DE LA MISE AU POINT 4 MOTEUR 1 TYPE DE BOUGIE 2 ECARTEMENT DES ELECTRODES 3 REGIME DE RALENTI CR8E NGK 1800 50 r min EE SPECIFICATIONS DE LA MISE AU POINT MOTEUR 1 TYPE DE BOUGIE 2 ECARTEMENT DES LECTRODES 3 REGIME DE RALENTI CR8E NGK 1400 100 r min RESTE WARNING DO NOT OPERATE ENGINE WITHOUT V BELT OR DRIVE GUARD AVERTISSEMENT NE PAS FAIRE FONCTIONNER LE MOTEUR SANS COURROIE EN V OU PROTECTEUR D EMBRAYAGE YRMAHA 850 7776200 6 RST90 Severe engine damage Des dommages graves risquent de survenir par can result from oil loss if suite de fuites d huile r sultant d un mauvais crankcase breather hoses branchement des tuyaux de reniflard du carter are not installed correctly Apr s l entretien de la batterie ou apr s la Inspect hoses and clamps d pose de l purateur d air assurez for correct installation vous que les brides et les tuyaux Location of the important labels 8 RS90GT RS90LTGT
78. e area behind the snowmobile is clear before reversing Watch behind e Reduce speed and avoid sharp turning when operating the snowmobile in re verse 1 To select the desired operating position pull the shift lever out slide it to FWD or to REV until it stops and then release it NOTICE Do not shift from FWD to REV or from REV to FWD while the snowmobile is moving as the drive train could be damaged tecsoos11 Operation RS90GT RS9OLTGT RST90GT 1 Pull out 2 Slide to FWD forward 3 Release 1 Pull out 2 Slide to REV reverse 3 Release RST90 1 Pull out 2 Slide to FWD forward 3 Release 55 Operation f LS l 1 Pull out 2 Slide to REV reverse 3 Release TIP The reverse buzzer beeps while the shift lever is in reverse 2 While squeezing the brake lever release the parking brake by moving the parking brake lever to the right and then release the brake lever 3 Squeeze the throttle lever slowly to start out 4 Turn the handlebar in the desired direc tion 5 Squeeze the brake lever to stop the snowmobile 6 Apply the parking brake by moving the parking brake lever to the left ESU11411 Stopping the engine e Turn the main switch to the off position to stop the engine 56 en 1 1 Off e Push down the engine stop switch to stop the engine in an emergency
79. ebar bolt a Move the handlebar up or down to adjust the handlebar height to the desired posi tion NOTICE Make sure that the pro jection on the handlebar is not installed into the area shown csoos71 Area where projection cannot be installed Tighten the front handlebar bolts to the specified torque and then tighten the rear handlebar bolts to the specified torque NOTICE Make sure each han dlebar holder is installed so that the smaller gap is facing forward cs00582 97 Periodic maintenance and adjustment e 4 1 Forward 2 Small gap Handlebar bolt tightening torque 23 Nm 2 3 m kgf 17 ft lbf 5 Install the handlebar cover ESU13702 Drive track and slide runners Drive track EWS00481 A broken track track fittings or debris thrown by the drive track could be danger ous to an operator or bystanders Observe the following precautions e Do not allow anyone to stand behind the snowmobile when the engine is running When the rear of the snowmobile is raised to allow the drive track to spin a suitable stand must be used to support the rear of the snowmobile Never allow anyone to hold the rear of the snowmo bile off the ground to allow the drive track to spin Never allow anyone near a rotating drive track e Inspect the drive track condition fre quently Replace any damaged slide metal Replace the drive track if it is damaged to the depth where fabric rein forc
80. eeeeees 11 Main Switch cccceeeeeetteeeees 11 Starter choke lever RST90 11 Throttle lever 11 Throttle override system TO RS strass 12 Multi function meter unit 13 High beam indicator light 16 Low coolant temperature indicator light sans eden asian mms 17 Fuel meter and grip thumb warmer level indicator 18 Fuel level warning indicator 20 Oil level warning indicator 21 Coolant temperature warning INGICATON zx same ab see 21 Self diagnosis device 0 22 Engine stop switch eee 22 Headlight beam switch Le GETS sn ss 23 Grip thumb warmer adjusting SWITCH she ns ns 23 Auxiliary DC jack 0 0 cece 24 Helmet shield heater jack RS90GT RS9OLTGT RST9OGT utilement 25 Brake lever cccceeeeeeeteeeeeeee 25 Parking brake lever assecc 26 Shift lever arser eidir 26 Drive guard 27 V belt holders 28 Passenger grips RST90GT 29 Passenger grip warmer switch RST90 RST9OGT eee 29 Passenger footrests RST90 RST90GT oaaae 30 Contents Backrest RST90 RST90GT 30 Storage compartment RS90GT RS9OLTGT RST9OGT 31 Storage areas RST90 33 Tow hitch bracket RST90 RST9OGT eee 35 UC T EE aceea 36 SUSPENSION
81. ement If there is any snow on the air filter element remove the element brush off the snow and then in stall the air filter element 9 Fit the weatherstrip on the headlight unit into the recess in the top of the air filter 8 case cover 1 Slot 2 Projection Z AR BS D PRO SLT SD a ON YZ V Sn 1 Air filter element frame 1 Weatherstrip 10 Install the headlight unit bolts and then tighten them to the specified torque Tightening torque Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft lbf 11 Install the top cover the left and right side covers and the shroud 7 Place the air filter element frame in the RST90 original position and then install the air 1 Place the snowmobile on a level surface filter case cover by hooking the fasteners and apply the parking brake 2 Open the shroud 74 Periodic maintenance and adjustment 3 Remove the air filter case cover by un 5 Place the air filter element frame in the hooking the case fastener and the case original position cover fasteners 6 Install the air filter case cover and attach the air filter case by hooking all the fas teners 7 Close the shroud RSTI0GT 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud and the top cover See page 63 for removal procedures 3 Remove the headlight unit bolt and the windshield stay bolts on each side of the 1 Air filter case fastener s
82. ement material is visible or support rods are broken Otherwise track dam age or failure could result in loss of braking ability and snowmobile control which could cause an accident Checking the drive track EWS00490 em Do not operate the snowmobile if you find damage to the drive track or if it has been maladjusted Drive track damage or failure could result in loss of braking ability and snowmobile control which could cause an accident Check the drive track alignment and deflec tion and check the track for wear and dam age Adjust or replace if necessary See the fol lowing section for more details Checking the drive track alignment 1 Lift the rear of the snowmobile onto a suit able stand to raise the drive track off the ground 2 Start the engine and rotate the drive track one or two turns Stop the engine 3 Check the drive track alignment with the slide runners If the alignment is incorrect adjust the drive track Periodic maintenance and adjustment 1 Slide runner Measuring the drive track deflection 1 Lay the snowmobile on its side 2 Measure the drive track deflection with a spring scale Pull at the center of the drive track with a force of 100 N 10 kgf 22 Ibf Of VV SJ TOR P 1 Spring scale TIP Measure the gap between the slide runner and the edge of the track window on both sides 1 Drive track deflection 2 Slide runner Standard drive tr
83. er PASSAGE DES RAPPORTS Ne changer de rapport que lorsque le v hicule est l arr t et que le moteur tourne au ralenti Tirer le s lecteur puis le pousser fond vers l avant position de marche avant FWD ou le tirer fond vers l arri re position de marche arri re REV Relacher le s lecteur 9 RST90GT SHIFTING INSTRUCTIONS Shift only with the machine stopped and the engine at Idle speed Pull the shift lever out then slida It to the forward FWD or reverse REV position until it stops Release the lever PASSAGE DES RAPPORTS Ne changer de rapport que lorsque le v hicule est l arr t et que le moteur tourne au ralenti e Tirer le s lecteur puls le pousser fond vers l avant position de marche avant FWD ou le tirer fond vers l arri re position de marche arri re REV Rel cher le s lecteur Ex 8HF 77763 60 FWD 8FA E0 JUMPER CABLE CONNECTION LEADS For connecting procedures refer to Owner s Manual FILS DE BRANCHEMENT DES CABLES DE DEMARRAGE e Effectuer le branchement des c bles de d marrage conform ment aux instructions du Manuel du propri taire BFA 2389C E0 TERED PULL Location of the important labels 13 RS9OLTGT A WARNING A AVERTISSEMENT NO PASSENGERS OR CARGO ON AUCUN PASSAGER OU MARCHANDISE THIS TRACK COVER SUR LE PROTECTEUR DE CHENILLE It was not designed to carry weight Ce protecteur n a pas t con u
84. er is completely closed TIP If you do not have a torque wrench available during a service operation requiring one take your snowmobile to a Yamaha dealer to check the torque settings and adjust them if necessary Periodic maintenance and adjustment ECS00940 NOTICE e Be sure to slide the covers onto the short end of each hexagon wrench be fore placing the wrenches in the tool kit e Securely tie the strap around the tool kit 1 Hexagon wrench cover 2 Hexagon wrench 3 Tool kit 4 Strap ESU14142 Removing and installing the shroud and covers RS90GT RS90LTGT RST90GT EWS00091 PE Be sure shroud and covers are secured before operation A loose shroud or cover could move and cause loss of control Shroud To remove the shroud Loosen the fasteners slowly raise the shroud and then unhook the shroud from the shroud stay 1 Fastener 2 Shroud 3 Shroud stay To install the shroud Hook the end of the shroud onto the shroud stay slowly lower it to the original position and then tighten the fasteners u 1 Shroud stay Left and right side covers To remove a side cover 1 Remove the shroud See the above pro cedure 2 Loosen the fasteners pull outward on the areas shown and then slide the side cov er forward to remove it 63 Periodic maintenance and adjustment Top cover RS90GT RS90LTGT To remove the top cover 1 Remove the shroud and the lef
85. er ni ouvrir 4AA 22259 70 Safety information ESU10193 As the vehicle s owner you are responsible for the safe and proper operation of your snowmobile When you ride your snowmo bile you must know and use the following for your safety Severe injury or death may result if you ignore any of the following Before you operate your snowmobile e Read the Owner s Manual and all labels Become familiar with all of the operating controls and their function Consult a Yamaha dealer about any control or func tion you do not understand e Wear protective clothing Wear an ap proved helmet and a face shield or gog gles Also wear a good quality snowmobile suit boots and a pair of gloves or mittens that will permit use of your thumbs and fin gers for operation of the controls e Do not operate the snowmobile after or while drinking alcohol or taking drugs Your ability to operate the snowmobile is re duced by the influence of alcohol or drugs Prepare your snowmobile e Perform the pre operation checks each time you use the vehicle to make sure it is in safe operating condition Failure to in spect or maintain the vehicle properly in creases the possibility of an accident or equipment damage See page 46 for a list of pre operation checks e Apply the parking brake before starting the engine Never drive the snowmobile with the parking brake applied This may over heat the brake disc and reduce braking abil
86. es on and the display switches to the grip warmer level When the thumb warmer adjusting switch is pressed the thumb warmer indicator comes on and the display switches to the thumb warmer level See Grip thumb warmer adjusting switch on page 23 for detailed information 19 Control functions im ne Hl j a EDLO 3 Grip warmer indicator 2 Thumb warmer indicator RS 1 Thumb warmer adjusting switch TIP e The grip thumb warmer level is displayed for 5 seconds after releasing the grip thumb warmer adjusting switch then the display switches to the fuel meter e The top segment of the grip thumb warmer level indicator flashes once when the grip thumb warmer adjustment reaches the 20 maximum level The bottom segment of the grip thumb warmer level indicator flashes once when the grip thumb warmer adjust ment reaches the minimum level e When the engine is started the grip thumb warmer levels are set to the levels selected when the engine was last stopped ESU13252 Fuel level warning indicator m The fuel level warning indicator and the warn ing light come on when the fuel level is low See page 18 for details The fuel level warning indicator the warning light the fuel meter indicator RS90GT RS90LTGT RST90GT and all segments of the fuel meter start to flash when a malfunc tioning sensor disconnected coupler broken lead or short circuit is detected by the
87. even if you are an experi enced rider Do not attempt to operate at maximum performance until you are totally fa miliar with the snowmobile s handling and performance characteristics The beginning operator should select a large flat area to become familiar with the snowmo bile Make sure that this area is free of obsta cles and other traffic You should practice control of the throttle and brake and master turning techniques in this area before trying more difficult terrain Set the parking brake and follow the instruc tions on page 48 to start the engine Once the engine has warmed up you are ready to be gin riding your snowmobile To start out and accelerate 1 With the engine idling release the park ing brake 2 Apply the throttle slowly and smoothly The V belt clutch will engage and you will start to accelerate WARNING Do not allow anyone to stand behind the snowmobile when starting the engine A broken track track fittings or debris thrown by the track could be danger ous to bystanders ewsovss0 Operation Braking EWS00220 e Many surfaces such as ice and hard packed snow require much longer stop ping distances Be alert plan ahead and begin decelerating early e Improper use of the brake can cause the drive track to lose traction reduce con trol and increase the possibility of an accident When slowing down or stopping release the throttle and apply the brake gently not sud denly T
88. he high beams of the headlights are switched on See page 23 for headlight beam switch operation RS90GT RS90LTGT RST90GT Control functions RS90GT RS9OLTGT RST90GT 1 High beam indicator light D COW Sope eny id 1QDQDID PATTDA 1 High beam indicator light D ESU13761 Low coolant temperature indi cator light F The low coolant temperature indicator light comes on when the coolant temperature is low and informs the rider that the snowmobile should be warmed up After the engine is started warm it up until the indicator light goes off The snowmobile can be operated normally af ter the indicator light goes off 1 Low coolant temperature indicator light F 1 Low coolant temperature indicator light F 2 Warning light A 3 Engine trouble warning indicator 4 Two digit code 86 TIP e RS90GT RS9OLTGT RST90GT Drive the snowmobile at low speeds when the low coolant temperature indicator light is on If the engine speed is too high maximum en gine speed is reduced to protect the engine e RST90 Drive the snowmobile at low speeds when the low coolant temperature indicator light is on If the engine speed is too high the warning light and engine trou ble warning indicator flash and the two digit code 86 flashes in the error code display When this occurs maximum engine speed is reduced to protect
89. headlight unit bolt and the windshield stay bolts RST90GT on each side of the snowmobile RS90GT RS90LTGT 1 Headlight unit bolt RST90GT 3 1 Headlight unit bolt 2 Windshield stay bolt Unhook the headlight unit as shown then lift it up and move it rearward away from the air filter case cover NOTICE Be careful not to scratch the snowmobile when moving the headlight unit ECS00920 1 Headlight unit Unhook the air filter case fastener and disconnect the air temperature sensor coupler 109 Periodic maintenance and adjustment 7 Lift up the air filter case disconnect the ISC Idle Speed Control unit inlet hose and cylinder head breather hose from the case and then remove the case 1 Air filter case fastener 2 Air temperature sensor coupler 5 Loosen the joint clamp bolts 1 Cylinder head breather hose 2 ISC Idle Speed Control unit inlet hose 8 Unhook the battery band and then re move the battery cover Joint clamp bolt 6 Slide the oil tank breather hose clamp away from the air filter case and then dis connect the oil tank breather hose 1 Battery cover 2 Battery band 9 Disconnect the negative battery lead by removing the bolt 1 Oil tank breather hose clamp 2 Oil tank breather hose 110 Periodic maintenance and adjustment RS90GT RS9OLTGT 1 Negative battery lead 10 Replace the
90. hylene Number of teeth 9 Transmission Clutch type Automatic centrifugal engagement Overall reduction ratio RS90GT 6 02 1 58 1 RS9OLTGT 6 18 1 63 1 RST90 6 74 1 77 1 RST90GT 6 44 1 70 1 Sheave distance 267 0 270 0 mm 10 51 10 63 in Sheave offset 13 5 16 5 mm 0 53 0 65 in Engagement speed Subject to change according to elevation settings RS90GT 3100 3500 r min RS9O0LTGT 3100 3500 r min RST90 3000 3400 r min RST90GT 2900 3300 r min Shift speed Subject to change according to elevation settings Usually achieved after approximately 800 m 0 5 mi traveled RS90GT 8000 8500 r min RS90LTGT 8000 8500 r min RST90 8250 8750 r min RST90GT 8000 8500 r min Drive chain type Silent chain enclosed in oil bath Drive chain housing oil Type SAE 75W or 80W API GL 3 Gear oil Capacity 0 25 L 0 26 US qt 0 22 Imp qt Reverse system Yes Primary reduction ratio 3 80 1 00 1 Secondary reduction ratio RS90GT 38 24 1 58 RS9OLTGT 39 24 1 63 RST90 39 22 1 77 RST90GT 39 23 1 70 Secondary reduction ratio R RS90GT 2 08 RS90LTGT 2 08 RST90 2 27 RST90GT 2 17 Fuel tank capacity RS90GT 35 6 L 9 41 US gal 7 83 Imp gal RS9OLTGT 35 6 L 9 41 US gal 7 83 Imp gal RST90 39 3 L 10 38 US gal 8 65 Imp gal RST90GT 35 6 L 9 41 US gal 7 83 Imp gal Specifications Engine oil quantity With oil filter cartridge replacement RS90GT 3 3 L 3 49 US qt 2 90 Imp qt RS9OLTGT 3 3 L 3 4
91. i parking brake before attempting to start engine Never run this vehicle with the parking brake applied 2 T siop engine in an emergency push ihe erare opan switch down Do not operate engine without drive belt or drive guard Make sure the fuel tank cap is closed securely affer refueling Do not operate this vehicle on public roads You could collide with another vehicle Gheaklever poston Foard or Reverse before moving Weal an approved helmet eye protection and adequate clothing for snowmobiling AENDEVTERTOUTRSGUEDE BLESS SERFUSE OU MEVE MORTELE VEUILLEZ SUIVRE LES RECOMMANDATIONS SUIVANTES Avant d utiliser ce v hicule ire le manuel du FES et toutes les tiquettes Ge v hicule est une machine haute performance Elle doit tre conduite par un conducteur exp riment Avant de d marrer le moteur v rifier l op ration du frein de l acc l rateur et de la direction Le frein de s curit doi tre appliqu lors du d marrage Ne pas rouler avec le frein de s curit actionn En cas d urgence utiliser l interrupteur d arr t du moteur Ne pas laisser tourer le moteur sans la courroie ou sans son garde S assurer que le bouchon du r servoir soit bien referm apr s le remplissage Ain d vier tout risque de colision ne pas rouler sur un chemin pub V rifier la position du levier marche avant ou am re avant d tre en marche Toujours porter un casque approuv et un habillement de motoneigist
92. iately af ter the engine is turned off Coming into contact with or getting any engine oil on your clothes could result in burns 77 Periodic maintenance and adjustment ECS00482 NOTICE e Do not run the engine with too much or not enough oil in the oil tank Oil could spray out or the engine could be dam aged e Be sure to change the engine oil after the first 800 km 500 mi of operation and every 4000 km 2500 mi thereafter or at the start of a new season other wise the engine will wear quickly e The oil filter cartridge should be re placed after the first 800 km 500 mi of operation and every 20000 km 12000 mi of operation thereafter To check the engine oil level 1 Place the snowmobile on a level surface and apply the parking brake 2 Start the engine warm it up for 10 15 minutes and then turn it off TIP e The engine can also be warmed up by driv ing the snowmobile for 10 15 minutes e After operating the snowmobile allow the engine to idle for at least 10 seconds before turning it off 3 Remove the shroud and the right side cover RS90GT RS9OLTGT RST90GT or open the shroud RST90 78 See page 63 RS90GT RS9OLTGT RST90GT or page 67 RST90 for the procedures 4 Disconnect the oil level gauge coupler NOTICE Disconnect the oil level gauge coupler before removing the oil filler cap otherwise the cable could twist and break tecsoo452 RS90GT RS90LTGT RS
93. ill correct the air fuel ratio Be sure to have a Yamaha dealer make these adjustments Remember Less air at higher altitude means there is less horsepower available even with the optimal air fuel ratio Expect acceleration and top speed to be reduced at higher altitudes To overcome operating with less power at high altitudes your snowmobile may also re quire different settings for the drive chain gears and V belt clutch to avoid poor perfor mance and rapid wear If you plan to operate your snowmobile at an altitude different from the area where you bought it be sure to con sult a Yamaha dealer The dealer can tell you if there are any changes necessary for the al titude where you plan to ride NOTICE The drive chain gears and V belt clutch should be adjusted when operating above a high altitude of 900 m 3000 ft Consult a Yamaha dealer tecsoo31 ESU11950 Valve clearance The valve clearance changes with use result ing in improper air fuel mixture and or engine noise To prevent this from occurring the valve clearance must be adjusted by a Yamaha dealer at the intervals specified in the periodic maintenance chart ESU13793 Engine oil and oil filter cartridge The engine oil level should be checked before each use In addition the oil must be changed and the oil filter cartridge replaced at the inter vals specified in the periodic maintenance and lubrication chart EWS00370 Engine oil is extremely hot immed
94. ine oil if necessary If the oil level warning indicator and the warn ing light still remain on have a Yamaha dealer check the snowmobile ESU10513 Coolant temperature warning indicator 5 If the engine overheats the coolant tempera ture warning indicator and the warning light come on When this occurs stop the engine immediately and allow the engine to cool down and then check the coolant level in the coolant reservoir See page 83 for checking procedures RS90GT RS9OLTGT RST90GT 1 Coolant temperature warning indicator CE 2 Warning light A 21 Control functions RST90 RS90GT RS9OLTGT RST90GT Sim MPH ERH E en 1 Coolant temperature warning indicator E 2 Warning light A ECS00041 NOTICE Do not continue to operate the engine if it is overheating ESU13771 Self diagnosis device This model is equipped with a self diagnosis device for various electrical circuits If a problem is detected in any of those cir cuits the warning light and the engine trouble warning indicator flash and an error code dis plays RS90GT RS9OLTGT RST90GT or flashes slowly RST90 in the meter display Note the error code and then have a Yamaha dealer inspect the snowmobile as soon as possible NOTICE Do not continue to oper ate the engine longer than necessary if there is an error code to avoid possible en gine dam
95. ing force of the rear shock absorber RS90GT RS90LTGT EWS00161 Do not turn the remote adjusting dial while the snowmobile is moving as this could cause loss of control an accident and in jury ECS00291 NOTICE Be sure to stop the remote adjusting dial at a marked position around the dial where there is a click The rebound damping force can be adjusted by turning the rear shock absorber damping force remote adjusting dial To increase the rebound damping force turn the adjusting dial in direction a To decrease the rebound damping force turn the adjusting dial in direction b 1 Rear shock absorber damping force remote adjusting dial 2 Standard position 42 Rebound damping setting Minimum soft 11 click s in direction b Standard Adjusting dial aligned with standard position match mark Maximum hard 11 click s in direction a With the adjusting dial in the standard position ESU13290 Adjusting the compression damping force of the rear shock absorber RST90GT The compression damping force can be ad justed by turning the adjusting knob To increase the compression damping force turn the adjusting knob in direction a To de crease the compression damping force turn the adjusting knob in direction b NOTICE Do not continue to turn the adjusting knob in direction a after it stops The shock ab sorber could be damaged and damping force adjustments will not be able to be
96. it into the recess in the top of the air filter case cover 1 Weatherstrip 16 Install the headlight unit bolts and wind shield stay bolts RST90GT and then tighten them to their specified torques Tightening torques Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft Ibf Windshield stay bolt 14 Nm 1 4 m kgf 10 ft Ibf 17 Install the top cover the left and right side covers and the shroud TIP If the fuse immediately blows again ask a Yamaha dealer to inspect the snowmobile RST90 The main fuse is located under the air filter case The fuse box which contains the fuses for the individual circuits is located behind the right side cover 1 Open the shroud 2 Remove the right side cover See page 63 for removal procedures 3 Unhook the air filter case fastener 1 Air filter case fastener 4 Loosen the joint clamp screws 1 Joint clamp screw 5 Slide the oil tank breather hose clamp away from the air filter case and then dis connect the oil tank breather hose 1 Oil tank breather hose clamp 2 Oil tank breather hose 6 Slide the crankcase breather hose clamp crankcase side up and then disconnect the crankcase breather hose from the en gine 113 Periodic maintenance and adjustment 1 Crankcase breather hose clamp crankcase 1 Main fuse side 2 Spare main fuse 2 Crankcase breather hose 7 Lift up the air filter case slide the crank case breathe
97. ki stance 1086 mm 42 8 in Engine Type Liquid cooled 4 stroke 12 valves Cylinder arrangement Backward inclined parallel 3 cylinder Displacement RS90GT 1049 cm RS90LTGT 1049 cm RST90 973 cm RST90GT 1049 cm Bore x stroke RS90GT 82 0 x 66 2 mm 3 23 x 2 61 in RS90LTGT 82 0 x 66 2 mm 3 23 x 2 61 in RST90 79 0 x 66 2 mm 3 11 x 2 61 in RST90GT 82 0 x 66 2 mm 3 23 x 2 61 in Idling speed RS90GT 1250 1350 r min RS9OLTGT 1250 1350 r min RST90 1300 1500 r min RST90GT 1250 1350 r min Engine oil Recommended grade API service SG type or higher JASO standard MA Recommended brand YAMALUBE 122 Type SAE OW 30 Carburetor Model x quantity RST90 CVK40 x 3 Fuel injection ID mark RS90GT 8JA1 00 RS90LTGT 8JA1 00 RST90GT 8JA1 00 Fuel Type REGULAR UNLEADED GASOLINE ONLY Minimum pump octane R M 2 86 Starting system Electric starter Chassis Drive track Material Molded rubber fiberglass rod reinforced Type RS90GT Extrovert drive type RS90LTGT Extrovert drive type RST90 Internal drive type RST90GT Internal drive type Width 381 mm 15 0 in Deflection RS90GT 30 0 35 0 mm 1 18 1 38 in RS9OLTGT 30 0 35 0 mm 1 18 1 38 in RST90 30 0 35 0 mm 1 18 1 38 in RST90GT 20 0 25 0 mm 0 79 0 98 in Length on ground RS90GT 768 mm 30 2 in RS9O0LTGT 960 mm 37 8 in RST90 985 mm 38 8 in RST90GT 985 mm 38 8 in Rear suspension Type Slide rail suspension Track sprocket wheel Material Polyet
98. l the bulb holder cover and then connect the headlight coupler Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay Projection Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover Periodic maintenance and adjustment 1 Weatherstrip 1 Headlight beam adjusting screw 11 Install the headlight unit bolts and wind 3 Install the top cover shield stay bolts and then tighten them to RST90 their specified torques 1 Open the shroud 2 Insert a Phillips screwdriver into the hole Tightening torques under the shroud to turn the headlight Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft lbf beam adjusting screw To lower the Windshield stay bolt headlight beams turn the Phillips screw 14 Nm 1 4 m kgf 10 ft Ibf driver in direction a To raise the head light beams turn the Phillips screwdriver 12 Install the top cover and the shroud in direction b ESU14150 Adjusting the headlight beams RS90GT RS90LTGT RST90GT 1 Remove the top cover See page 63 for removal procedures 2 Use a Phillips screwdriver to turn the headlight beam adjusting screw and ad just the headlight beams To lower the headlight beams turn the headlight beam adjusting screw in direction a To raise the headlight beams turn the head 1 Headlight beam adjusting screw light beam adjusting screw in direction b
99. le for all new Yamaha snowmobiles purchased between June 1 and December 1 All new Yamaha snowmobiles purchased between June 1 and December 1 will have the warranty extended to November 30 of the following year YAMAHA MOTOR CORPORATION U S A Post Office Box 6555 Cypress California 90630 128 WARRANTY QUESTIONS AND ANSWERS Q A What costs are my responsibility during the warranty period The customers responsibility includes all costs of normal maintenance services non warranty repairs accident and collision damages as well as oil spark plugs clutch drive belts and slide runners What are some examples of abnormal strain ne glect or abuse These terms are general and overlap each other in areas Specific examples include Running the ma chine out of oil hitting an object submerged under snow operation on surfaces other than snow or ice operating the machine with a broken or damaged part which causes another part to fail and so on If you have any specific questions on operation or maintenance please contact your dealer for advice May perform any or all of the recommended main tenance shown in the Owner s Manual instead of having the dealer do them Yes if you are a qualified snowmobile mechanic and follow the procedures specified in the Owner s and Service Manual We do recommend however that items requiring special tools or equipment be done by a Yamaha snowmobile dealer
100. ll keep your snowmobile in the safest and most efficient condition possible Safety is an obligation of the vehicle owner operator The most important points of vehicle inspection adjustment and lubrication are explained on the following pages EWS00341 Failure to properly maintain the snowmobile or performing maintenance activities incor rectly may increase your risk of injury or death during service or while using the snow mobile If you are not familiar with snowmobile service have a Yamaha dealer perform service EWS00700 Turn off the engine when performing maintenance unless otherwise specified e Arunning engine has moving parts that can catch on body parts or clothing and elec trical parts that can cause shocks or fires e Running the engine while servicing can lead to eye injury burns fire or carbon mon oxide poisoning possibly leading to death See page 6 for more information about carbon monoxide EWS00790 Brake discs calipers and linings can become very hot during use To avoid possible burns let brake components cool before touching them Maintenance replacement or repair of the emission control devices and systems may be performed by any repair establishment or individual that is certified if applicable Proper periodic maintenance of your snowmobile is important in order to enjoy long pleasur able use Especially important are the maintenance services related to emission control These controls not only
101. lly and the display will return to the prior mode after the snowmo bile has been refueled and traveled 5 km 3 mi Oil change tripmeter When the periodic oil change interval is reached at the initial 800 km 500 mi then at every 4000 km 2500 mi thereafter the oil change tripmeter and OIL flash alternately in the odometer display and the tripmeter starts 14 counting the distance traveled from that point When this occurs change the engine oil as soon as possible See page 77 for the oil change procedure mw te WV E i Ld km h oH tke A f TIP e The oil change tripmeter will flash only when the snowmobile is stopped e To return to the previous display mode push the SELECT button To display the oil change tripmeter again turn the key to the off position then back to the on position After changing the engine oil reset the oil change tripmeter as follows To reset the oil change tripmeter when the engine oil was changed after the oil change tripmeter appeared 1 To display the oil change tripmeter turn the key to the on position 2 Push the RESET button for at least 1 second while the oil change tripmeter and OIL are flashing alternately in the odom eter display The distance traveled since the last oil change and OIL will flash al ternately in the odometer display 3 Push the RESET button for approxi
102. lower the temperature Continue to press the switch until the temper ature level returns to the minimum level and then raise the temperature to the desired lev el See Fuel meter and grip thumb warmer level indicator on page 18 for detailed information RST90 The grip warmer adjusting switch and the thumb warmer adjusting switch control the electrically heated handlebar grips and throt tle lever respectively 1 Grip warmer adjusting switch 23 Control functions 1 Thumb warmer adjusting switch To raise the temperature To raise the temperature press the respec tive switch to HI To lower the temperature To lower the temperature press the respec tive switch to LO See Fuel meter and grip thumb warmer level indicator on page 18 for detailed information ESU10696 Auxiliary DC jack The auxiliary DC jack is located in the front panel and can be used for accessories TIP The auxiliary DC jack can only be used if the engine is running To use the auxiliary DC jack 1 Start the engine 2 Open the auxiliary DC jack cap and then insert the accessory power plug into the jack 24 RS90GT RS9OLTGT RST90GT 1 Auxiliary DC jack cap 2 Auxiliary DC jack 1 Auxiliary DC jack cap 2 Auxiliary DC jack 3 After using the auxiliary DC jack be sure to remove the accessory power plug from the jack and to close the auxiliary DC jack cap ECS00122 NOTICE e To av
103. mately 3 seconds 00000 and OIL will flash alternately in the odometer display 3 times and then the display will return to the previous display mode If the engine oil is changed before the oil change tripmeter appears in the display i e before the periodic oil change interval has been reached the tripmeter must be reset af ter the oil change for the next periodic oil change to be indicated at the correct time In that case reset the oil change tripmeter as follows To reset the oil change tripmeter when the engine oil was changed before the oil change tripmeter appeared 1 Push the SELECT button until ODO is displayed and then push the RESET button for at least 1 second The distance traveled since the last oil change and OIL will flash alternately in the odometer display 2 Push the RESET button for approxi mately 3 seconds 00000 and OIL will flash alternately in the odometer display 3 times and then the display will return to the previous display mode Clock 1 1 Clock To set the clock 1 Turn the key to the on position 2 Push the SELECT button and RESET button simultaneously until the hour digits start flashing Control functions 3 Push the RESET button to change the hour setting a
104. mmediately turn the engine off and make sure that the en gine oil drain bolts the cylinder head cap and the oil filler cap are installed correct ly Turn the engine off and then connect the oil level gauge coupler NOTICE If oil is leaking or the oil level warning indica tor comes on when the engine is run ning immediately turn the engine off and have a Yamaha dealer check the snowmobile Continuing to operate the engine under such conditions could cause severe engine damage ECS00471 21 Place the bottom panel in the original po sition and then install the bolts Place the right lower cover in the original position and then install the screws RS90GT RS9OLTGT RST90GT RS90GT RS9OLTGT RST90GT 22 1 Right lower cover 23 Install the top cover the right side cover and the shroud RS90GT RS9OLTGT RST90GT or install the right side cover and close the shroud RST90 ESU14202 Cooling system The coolant level should be checked before each ride In addition the cooling system must be bled at the intervals specified in the periodic maintenance and lubrication chart EWS00380 Do not remove the coolant reservoir cap when the engine is hot Scalding hot fluid and steam may be blown out under pres sure which could cause serious injury When the engine has cooled place a thick rag or towel over the coolant reservoir cap and slowly rotate the cap counter clockwise to the detent This proce
105. nd then push the SE LECT button The minute digits will start flashing 4 Push the RESET button to change the minute setting and then push the SE LECT button The clock starts when the SELECT button is released TIP The clock must be set again when the battery is disconnected Display brightness control This function allows you to adjust the bright ness of the meter unit display to suit the out door lighting conditions Ss 4 ao0000 1 Display brightness level DANS To adjust the display brightness 1 Turn the key to the off position 2 Push and hold down the SELECT but ton 3 Turn the key to the on position and then after 5 seconds release the SELECT button 4 Push the RESET button to select the desired display brightness level and then push the SELECT button The display returns to the previous display mode RST90 The multi function meter unit is equipped with the following e a digital speedometer 15 Control functions e a tachometer e an odometer e a tripmeter which shows the distance trav eled since it was last set to zero e warning indicators which show engine trouble coolant temperature fuel level and oil level warnings e indicator lights which show high beam and low coolant temperature conditions e a warning light which shows warnings to gether
106. nger grip warmer switch 2 Off 3 HI high 4 LO low RST90GT 1 Passenger grip warmer switch 2 Off 3 HP high 4 LO low ESU14050 Passenger footrests RST90 RST90GT The passenger footrests can be installed in two RST90 or three RST90GT different po sitions to suit the passenger s preference To change the position of a footrest remove the screws place the footrest in the desired position and then install and tighten the screws 30 1 Footrest 2 Screw ECS00131 NOTICE e Make sure that the screws are tightened securely after changing the position of the footrests e Do not overtighten the screws other wise the footrest may be damaged ESU14130 Backrest RST90 RST90GT EWS00131 Do not sit on the backrest Otherwise you could lose your balance fall and be in jured The angle RST90 RST90GT and position RST90GT of the backrest are adjustable To adjust the backrest angle Turn the backrest adjusting knob until the backrest reaches the desired angle 1 Backrest 2 Backrest adjusting knob die ae Po 1 Backrest 2 Backrest adjusting knob RST90GT To adjust the backrest position Pull the backrest adjusting lever upward and then move the backrest to the desired posi tion 1 Backrest 2 Backrest adjusting knob Control functions When riding without a passenger the back rest can be moved to the forwa
107. nowmobile 2 Air filter case cover fastener 4 Lift up the air filter element frame and check the air filter element If there is any snow on the air filter element remove the element brush off the snow and then in stall the air filter element 1 Headlight unit bolt 2 Windshield stay bolt 4 Unhook the headlight unit as shown then lift it up and move it rearward away from the air filter case cover NOTICE Be careful not to scratch the snowmobile 1 Air filter element frame when moving the headlight unit ECS00920 75 Periodic maintenance and adjustment 1 Headlight unit 7 Place the air filter element frame in the 5 Remove the air filter case cover by un original position and then install the air hooking the fasteners filter case cover by hooking the fasteners 8 Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay 1 Air filter case cover fastener 6 Lift up the air filter element frame and check the air filter element If there is any snow on the air filter element remove the element brush off the snow and then in stall the air filter element 9 Fit the weatherstrip on the headlight unit into the recess in the top of the air filter FRE Pn D ET case cover YEON L COS 2 Projection SEE D ps RE 71 IN r 1 Air filter element frame 1 Weatherstrip 76 Periodic maintenance and adjustment
108. ntenance and adjustment To align the skis 1 Turn the handlebar so the skis face straight ahead 2 Check the following for ski alignment e Skis are facing forward e Ski toe out distance A distance B is within specification 1 Ski runner wear limit eee sie k e ae 1 Distance A 2 Distance B Ski toe out distance A distance B 0 0 15 0 mm 0 00 0 59 in 1 Ski wear limit 2 Ski runner TIP Ski runner wear limit Move the front tip of each ski fully inward be RS90GT 6 0 mm 0 24 in fore measuring or aligning RS9OLTGT 6 0 mm 0 24 in RST90 8 0 mm 0 31 in 3 If the alignment is not correct consult a RST90GT 8 0 mm 0 31 in Yamaha dealer Ski wear limit ESU12164 RS90GT 12 mm 0 5 in i RS9OLTGT 12 mm 0 5 in SE e E excessive free play RST90 24 mm 0 9 in i RST90GT 12 mm 0 5 in To check the handlebar 1 Push the handlebar up and down and ECS00560 back and forth NOTICE 2 Turn the handlebar slightly to the right Avoid scratching the skis when loading and left and unloading the snowmobile when riding in areas with little or no snow or on sharp edges such as concrete curbs etc This will wear or damage the skis 96 If excessive free play is felt consult a Yamaha Periodic maintenance and adjustment dealer RST90 To adjust the handlebar height 1 2 Remove the handlebar cover 1 Handlebar cover Loosen the handlebar bolts 1 Handl
109. nut to the specified torque Ecsoosso Locknut tightening torque 25 Nm 2 5 m kgf 18 ft Ibf 45 Pre operation checks ESU11071 Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition Always follow the inspection and maintenance procedures and schedules described in the Owner s Manual EWS00191 Failure to inspect or maintain the vehicle properly increases the possibility of an acci dent or equipment damage Do not operate the vehicle if you find any problem If a prob lem cannot be corrected by the procedures provided in this manual have the vehicle inspected by a Yamaha dealer ESU11081 Pre operation check list CHECKS e Check fuel level e Refuel if necessary e Check fuel line for leakage e Check oil level in engine e If necessary add recommended oil to specified level e Check vehicle for oil leakage Engine oil e Check coolant level Coolant e Add if necessary e Check for wear and damage pelt e Replace if necessary e Make sure the drive guard is installed securely Drive guard e Check the drive guard mounts for damage e Check operation e If soft or spongy have Yamaha dealer bleed hy draulic system e Check brake pads for wear e Replace if necessary e Check fluid level in master cylinder e If necessary add recommended brake fluid to specified level e Check hydraulic system for leakage e Check that there is no
110. ock absorbers front adjusting spring preload s e 37 Index Shroud and covers removing and installing RS90GT RS9OLTGT RST90GT 63 Shroud and right side cover opening and closing removing and installing ASIE AE E Ie 67 Skis and ski runners 95 Spark plugs Checking cceeeeeeeeeeee 68 Specifications 122 Starter choke lever RST90 11 Starting the engine 48 Steering system 96 Stopping the engine ce eeeeeeeeees 56 Stora gehaen he e eet 120 Storage areas RST90 33 Storage compartment 33 Storage compartment RS90GT RS9OLTGT RST90GT 31 SUSPENSION 1 ee eeeeetee ete teeeeeteeteeeeeteeteaees 37 T Throttle lever 11 Throttle lever free play adjusting 69 Throttle override system T O R S 12 Throttle override system T O R S checking is ara 72 TOOL Kit psc est ahi i eee 62 Tow hitch bracket RST90 RST90GT 35 Transporting ninii 56 Troubleshooting 116 Two up 2 up adjusting blocks adjusting RST90 41 V Valve clearance 77 ATA aTe A aE A Mek eee Seok 88 V belt holders ccceeeceeeeeeeeeeneeeeeeeeees 28
111. of sparks open flames or other sources of ignition such as the pilot lights of water heaters and clothes dry ers 2 Do not overfill the fuel tank Stop filling when the fuel reaches the bottom of the filler tube Because fuel expands when it heats up heat from the engine or the sun can cause fuel to spill out of the fuel tank 36 1 Filler tube 2 Maximum fuel level 3 Wipe up any spilled fuel immediately 4 Be sure the fuel tank cap is closed se curely by turning it clockwise a Ne EWS00680 Gasoline is poisonous and can cause inju ry or death Handle gasoline with care Never siphon gasoline by mouth If you should swallow some gasoline or inhale a lot of gasoline vapor or get some gasoline in your eyes see your doctor immediately If gasoline spills on your skin wash with soap and water If gasoline spills on your clothing change your clothes Recommended fuel REGULAR UNLEADED GASOLINE ONLY Fuel tank capacity RS90GT 35 6 L 9 41 US gal 7 83 Imp gal RS9OLTGT 35 6 L 9 41 US gal 7 83 Imp gal RST90 39 3 L 10 38 US gal 8 65 Imp gal RST90GT 35 6 L 9 41 US gal 7 83 Imp gal Your Yamaha engine has been designed to use regular unleaded gasoline with a pump octane number R M 2 of 86 or higher or a research octane number of 91 or higher ECS00084 NOTICE e Oxygenated fuels gasohol containing a maximum 10 of ethanol E10 can be used although richer jetting may be re
112. oid circuit overload and a possible fuse blowing do not use accessories re quiring more than the maximum rated capacity for the auxiliary DC jack See page 109 for the specified fuse amper age e Do not use an automotive cigarette light er or other accessory with a plug that gets hot because the jack can be dam aged Maximum rated capacity DC 12 V 2 5 A 30 W ESU13264 Helmet shield heater jack RS90GT RS9OLTGT RST90GT The helmet shield heater jack is located on the left side of the handlebar TIP The helmet shield heater jack can only be used if the engine is running To use the helmet shield heater jack 1 Start the engine 2 Open the helmet shield heater jack cap and then insert the power plug of the hel met shield heater into the jack 1 Helmet shield heater jack cap 2 Helmet shield heater jack 3 After using the helmet shield heater be sure to remove its power plug from the jack and to close the jack cap ECS00892 NOTICE To avoid circuit overload and a possible fuse blowing do not use a helmet shield heater requiring more than the maximum rated capacity for the helmet shield heater jack See page 109 for the specified fuse amperage Control functions Maximum rated capacity DC 12 V 1 5 A 18 W ESU10571 Brake lever The snowmobile is stopped by braking the en tire drive system Squeeze the brake lever towards the handle bar grip to stop the snowmobile
113. or rected and that the engine can be operated without a problem before restarting the engine Continuing to operate with a mal function could cause loss of control or damage If the throttle valves or throttle cable malfunc tions during operation the T O R S will be ac tivated when the throttle lever is released The T O R S is designed to override the fuel injection RS90GT RS9OLTGT RST90GT or ignition RST90 and limit the engine speed to less than the clutch engagement speed if the throttle valves fail to return to the idle position when the throttle lever is re leased See page 122 for the clutch engage ment speed 12 A He Malfunc Idling Riding tion D Released Squeezed Released ever Throttle valve Closed Open Open Engine Engine T O R S T O R S runs runs will be ac properly properly tivated TIP If the T O R S is activated the warning light and engine trouble warning indicator flash and the two digit code 84 displays RS90GT RS9OLTGT RST90GT or flash es RST90 in the meter display If this oc curs have a Yamaha dealer check the system as soon as possible RS90GT RS9OLTGT RST90GT AN a VA FA km h Warning light A 5 Engine trouble warning indicator 3 Two digit code 84 1 Warning light A 2 Engine trouble warning indicator 3 Two digit code 84 ESU14100 Multi function meter unit
114. osition of the V belt will change If the V belt position is out of specification it must be adjusted to en sure proper clutch performance Have a Yamaha dealer make this adjust ment 1 Place the snowmobile on a level surface and apply the parking brake 2 Remove the shroud and the left side cov er RS90GT RS9OLTGT RST90GT or open the shroud RST90 and then re move the drive guard See page 27 for drive guard removal procedures 3 Remove the screws and then pull the left lower cover outward to remove it RS90GT RS9OLTGT RST90GT Periodic maintenance and adjustment RS90GT RS90LTGT RST90GT 6 Remove the V belt from the secondary sheave assembly and primary sheave assembly 7 Temporarily install the new V belt on the secondary sheave assembly only and then measure the V belt position Do not force the V belt between the sheaves the secondary sliding and fixed sheaves must touch each other 1 Screw Left lower cover N 4 Rotate the secondary sliding sheave clockwise and push it so that it separates from the secondary fixed sheave 1 Secondary sliding sheave 2 Secondary fixed sheave 5 Pull the V belt up over the secondary fixed sheave 1 Edge of the secondary sheave assembly 2 Standard V belt position Standard V belt position From 1 5 mm 0 06 in above the edge of the secondary sheave as sembly to 0 5 mm 0 02 in below the edge 8 If the V belt posi
115. pening the storage compartment lid move the backrest forward so that the lid can be opened See page 30 for backrest adjust ment procedures Maximum load limit 20 kg 44 Ibs To close the storage compartment Close the storage compartment lid and then hook the storage compartment latches Storage pouch The storage pouch is located inside the stor age compartment Use the storage pouch to store the tool kit manuals spare parts or oth er small items 1 Storage pouch Control functions ECS00781 NOTICE Before starting the engine make sure that the tool kit is securely fastened and that the storage pouch zipper is completely closed ESU10823 Storage areas RST90 This snowmobile is equipped with a storage S compartment rear storage area and rear car 1 Rear storage area rier 2 Rear carrier Storage compartment The storage compartment is located under Maximum load limit th shfr d Rear storage area 20 kg 44 Ibs Open the storage compartment by unhooking Rear carrier the fasteners to store the tool kit spare parts 10 kg 22 Ibs or other small items To remove the passenger seat and backrest 1 Pull the carrier lock lever away from the carrier lock bracket and then push it down to unlock the backrest and the rear carrier 1 Storage compartment 2 Fastener Rear storage area and rear carrier The rear storage area and the rear carrier are located at the
116. pour It could bend or break under load supporter un poids Il pourrait s incurver ou Anything placed here could block se briser sous la charge the view of the brake tail light Tout objet ou personne plac a cet endroit which could cause an accident pourrait bloquer la vue des feux d arr t arri re et ainsi causer un accident HA 77762 E0 14 RST90 RST90GT 15 RST90 RST90GT LOAD LIMIT CHARGE LIMITE LOAD LIMIT CHARGE LIMITE 10kg 221bs 20kg 44lbs 16 RST90 RSTI0GT MAX TOWING FORCE MAX VERTICAL FORCE FORCE DE REMORQUAGE MAX FORCE VERTICALE MAX 1176 N 120 kgf 264 Ibf 147 N 15 kgf 33 Ibf 8GS 2817S E0 17 RST90 This unit contains high pressure nitrogen gas Mishandling can cause explosion Read owner s manual for instructions Do not incinerate puncture or open AVERTISSEMENT Cette unit contient de l azote haute pression Une mauvaise manipulation peut entra ner d explosion e Voir le manuel d utilisateur pour les instructions e Ne pas br ler ni perforer ni ouvrir 17 RS90GT RS9OLTGT This unit contains high pressure nitrogen gas Mishandling can cause explosion Read owner s manual for instructions Do not incinerate puncture or open Cette unit contient de l azote haute pression Une mauvaise manipulation peut entra ner d explosion e Voir le manuel d utilisateur pour les instructions e Ne pas br ler ni perfor
117. proper maintenance Accident or collision damage Modification to original parts NoNe SPECIFIC EXCLUSIONS from this warranty shall include parts replaced due to normal wear or routine maintenance including oil spark plugs clutch drive belts slide runners and track THE CUSTOMER S RESPONSIBILITY under this warranty shall be to 1 Operate and maintain the snowmobile as specified in the appropriate Owners Manual 2 Give notice to an authorized Yamaha snowmobile dealer of any and all apparent defects within ten 10 days after discovery and make the machine avail able at that time for inspection and repairs at such dealers place of business You may locate your nearest authorized Yamaha dealer through your local telephone directory WARRANTY TRANSFER To transfer any remain ing warranty from the original purchaser to any subse quent purchaser it is imperative that the machine be inspected and registered for warranty by an authorized Yamaha snowmobile dealer In order for this warranty to remain in effect this inspection and registration must take place within ten 10 days after ownership transfer An inspection and registration fee will be charged for this service EMISSION CONTROL SYSTEM WARRANTY Yamaha Motor Corporation USA also warrants to the ultimate purchaser and each subsequent purchaser of each 2006 and later model Yamaha snowmobile cov ered by this warranty that the vehicle is designed built and equippe
118. py to help you get the Y E S coverage you need Yamaha Service Marketing PO Box 6555 Cypress CA 90630 1 866 937 3983 www yamaha motor com Y YAMAHA EXTENDED SERVICE A Air filter checking 73 Auxiliary DC jack 24 B Backrest RST90 RST90GT e eee 30 Battery nan a thai aia ne 108 Brake and parking brake seee 92 Brake lever 25 a E ETT 50 C Carburetors RST90 77 Center shock absorber and rear torsion springs adjusting spring preload RST90 RSTQOGT 39 Control rods adjusting cere 43 Coolant temperature warning indicator 21 Cooling system 83 D Drive chain housing 91 Drive Quan scceseesidecceeeaieszescsectaeiescnedtceness 27 Drive track and slide runners 98 Drive track life maximizing 54 DIVING 25 ck eke E E eth the et 55 E Engine idling speed adjusting RST90 69 Engine oil and oil filter cartridge 77 Engine stop switch 22 Extrovert drive sprocket RS9OGT RS9OLTGT eee 95 F Fittings and fasteners 108 FUG wees its fe nine Nine 36 Fuel level warning indicator 20 Fuel meter and grip thumb warmer level indicator 18 FUSE replacing 109 G General maintenance and lubrication chart seeren 60 Grip thumb warmer adjusting switch 23 H Headlight beam switch
119. r hose clamp air filter case side down disconnect the crankcase breather hose from the air filter case and then remove the air filter case 1 Crankcase breather hose clamp air filter case side 8 Disconnect the negative battery lead 9 Replace the blown fuse with one of the proper amperage Fuse box HEAD headlight fuse SIG signaling system fuse DC TERM auxiliary DC jack fuse C W carburetor warmer fuse IGN ignition fuse Spare fuse 1 2 3 4 5 6 7 114 Periodic maintenance and adjustment Specified fuses Main fuse 30 0A Spare main fuse 30 0A Headlight fuse 20 0A Signaling system fuse 10 0A Auxiliary DC jack fuse 3 0A Carburetor warmer fuse 20 0A Ignition fuse 15 0A Spare fuses 20 0 A 15 0 A 10 0 A 3 0 A 10 Connect the negative battery lead 11 Install the air filter case by reversing the removal steps 3 7 NOTICE Be sure to connect the breather hoses securely when installing the air filter case ECS00641 TIP When installing the air filter case connect the crankcase breather hose to the air filter case first and then connect it to the engine 12 Install the right side cover and close the shroud TIP If the fuse immediately blows again ask a Yamaha dealer to inspect the snowmobile 115 Troubleshooting ESU14162 Engine turns over but does not start Fuel system e No fuel supplied to
120. r leakage Exhaust system e Tighten or replace gasket if e necessary 59 Periodic maintenance and adjustment ESU11564 General maintenance and lubrication chart REMARKS INITIAL EVERY 1 month Seasonally or 800 km 500 mi 40 hr 200 hr Engine oil e Change warm engine before draining Engine oil filter car tridge e Replace Every e 20000 km 12000 mi Cooling system e Check coolant level e Bleed the cooling system if necessary Primary and sec ondary clutches e Check engagement and shift speed e Adjust if necessary Whenever operating ele vation is changed e Inspect sheaves for wear and damage e Inspect weights rollers and bushings for wear for primary e Inspect ramp shoes bushings for wear for secondary e Replace if necessary e Lubricate with specified grease Drive chain e Check chain slack e Adjust if necessary Initial at 500 km 300 mi and every 800 km 500 mi thereafter Drive chain oil e Check oil level e Change Brake and parking brake e Adjust free play and or replace pads if necessary e Change brake fluid See TIP following this chart Control cables e Make sure that operation is smooth e Lubricate if necessary Disc brake installa tion e Check for slight free play e Lubricate shaft with specified grease as required Every 1600 km 1000 mi
121. rber can be adjusted by turning its re bound damping force adjusting knob To increase the rebound damping force turn the adjusting knob in direction a To de crease the rebound damping force turn the adjusting knob in direction b Control functions 1 Rebound damping force adjusting knob Rebound damping setting Minimum soft 20 click s in direction b Standard RS90GT RS9OLTGT 12 RST9OGT 7 click s in direction b Maximum hard 3 click s in direction b With the adjusting knob fully turned in direction a TIP The damping forces will not decrease past the minimum levels even if the adjusting knobs are turned out more than the minimum set tings ESU13134 Adjusting the spring preload of the center shock absorber and the rear torsion springs RST90 RST90GT The spring preload can be adjusted by turning the adjusting nut on the center shock absorb er and the adjusters on the rear torsion springs Adjust the spring preload as follows Center shock absorber 1 Loosen the locknut 2 To increase the spring preload and there by harden the suspension turn the ad justing nut in direction a To decrease 39 Control functions the spring preload and thereby soften the suspension turn the adjusting nut in di rection b 1 Spring preload adjusting nut 2 Distance A 3 Locknut TIP The spring preload setting is determined by measuring distance A shown in the illu
122. rd most posi tion and its angle can be adjusted to suit the operators preference as shown ESU14120 Storage compartment RS90GT RS9OLTGT RST90GT RS90GT RS9OLTGT The storage compartment is located behind the seat Use the storage compartment to store the tool kit manuals spare parts or oth er small items To open the storage compartment Turn the fastener 1 2 turn in either direction and then fold the storage compartment cover up 1 Fastener 2 Storage compartment 31 Control functions To close the storage compartment Fold the storage compartment cover down and then turn the fastener to the original posi tion RST90GT This snowmobile is equipped with a storage compartment which includes a_ storage pouch Storage compartment ECS00900 NOTICE The bottom of the storage compartment may be hot during or immediately after op erating the snowmobile It can cause burns if it becomes extremely hot Further more heat in the storage compartment can affect the quality of food items and deform and discolor plastic items The storage compartment is located behind the seat Use the storage compartment to store the storage pouch spare parts or other small items To open the storage compartment Unhook the storage compartment latches and open the storage compartment lid 1 Storage compartment latch 2 Storage compartment lid 32 1 Storage compartment TIP Before o
123. rds e Avoid higher speeds or more difficult maneuvers until you have become thor oughly familiar with your snowmobile and all of its controls A snowmobile is a rider active vehicle and your riding position and your balance are the two basic factors of maneuvering your snow mobile Riding your snowmobile requires skills ac quired through practice over a period of time Take the time to learn the basic techniques well before attempting more difficult maneu vers Riding your new snowmobile can be a very enjoyable activity providing you with hours of pleasure However it is essential to familiar ize yourself with the operation of the snowmo bile to achieve the skill necessary to enjoy riding safely Before operating the snowmo bile read this Owners Manual completely and understand the operation of the controls Pay particular attention to the safety informa tion on page 6 Please read all warning and notice labels on your snowmobile Also read the Snowmobil ers Safety Handbook that is supplied with your snowmobile Learning to ride your snowmobile Before you ride always perform the pre oper ation checks listed on page 46 The short time spent checking the condition of the snowmo bile will be rewarded with added safety and a more reliable snowmobile Always wear the proper clothing for both warmth and to help protect you from injury if an accident occurs Become familiar with operating your snowmo bile at low speeds
124. rroie ou sans son garde apr s le remplissage v hicule est con u pour un conducteur seul aucun passager Verifier la position du levier marche avant ou arri re avant d tre en marche Wear an approved helmet eye protection and adequate clothing for phn porter un casque approuv et un habillement de motonelgiste Pr voir une protection pour les yeux BFR 77761 E0 1 RST90 2 ATTENTION Eviter de nettoyer le pare brise avec une solution alcaline ou acide ainsi qu avec de l essence ou un diluant Utiliser un d tergent neutre A WARNING A AVERTISSEMENT soweo pee Manton OR DEATH MAY RESULT IF YOU IGNORE ANY Read ie Owner s Manual and all labels betore operating this vehicle This vehicle is a high performance machi It should be operated by an experienced operat Sec tle brae and steering for proper operation foe starting engine Set parking brake before attempting to start engine Never run this vehicle wih the parking brake app To stop engine in an emergency push the engine stop switch down Do not me without drive bell Or arive guard 2 Make Sure the a TAk cap 1 lose Secure air refining Do not operate this vehicle on pubie roads You could colide with another vehicle Wear an approved helmet eye protection and adequate clothing for snowmobiling Check lever position Forward or Reverse before moving AFIN D VITER TOUT RISQ
125. s a cooling system leak Consult a Yamaha deal er ECS00500 NOTICE Operating the engine with an improperly bled cooling system can cause overheat ing and severe engine damage Replenishing the coolant 1 Place the snowmobile on a level surface and apply the parking brake 2 Periodic maintenance and adjustment Remove the shroud the right side cover and the top cover RST90GT or open the shroud RST90 See page 63 RST90GT or page 67 RST90 for the procedures Remove the coolant reservoir cap and add coolant until it reaches the COLD LEVEL mark RST90 1 COLD LEVEL mark 2 Coolant reservoir cap RST90GT 1 COLD LEVEL mark 2 Coolant reservoir cap RST90 TIP If you find any leaks consult a Yamaha deal RST90GT Recommended antifreeze High quality ethylene glycol antifreeze containing corrosion inhibitors Antifreeze and water mixing ratio 3 2 Total amount RST90 5 40 L 5 71 US qt 4 75 Imp qt RST90GT 5 40 L 5 71 US qt 4 75 Imp qt Start the engine and add coolant until the coolant level stabilizes and then stop the engine Check for any coolant leakage If coolant is leaking check for the cause Fill the coolant reservoir with coolant until it reaches the COLD LEVEL mark Install the coolant reservoir cap Install the top cover the right side cover and the shroud RST90GT or close the shroud RST90 87 Periodic mainten
126. snow under the air filter ele Air filter ment e If necessary brush off the snow Tool kit and recommended equipment e Check for proper placement e Make sure that the shroud and covers are securely fastened Shroud and covers e Check for wear and damage Skis and ski runners e If necessary have Yamaha dealer replace skis or ski runners 46 Pre operation checks CHECKS Drive track e Check the deflection e Adjust if necessary e Check for wear and damage e If necessary have a Yamaha dealer replace track Slide runners e Check for wear and damage e If necessary have Yamaha dealer replace slide runners 98 Steering e Check for excessive free play 96 Lights signals and switch es e Check operation e Correct if necessary 23 22 103 107 Throttle lever e Make sure that operation is smooth and spring back to its original position when released 11 Throttle override system T O R S e Check the T O R S for proper operation e If system is not functioning properly have Yamaha dealer check vehicle 72 47 Operation ESU13500 Read the Owners Manual carefully to be come familiar with all controls If there is a control or function you do not understand ask your Yamaha dealer EWS00201 Failure to familiarize yourself with the con trols can lead to loss of control which could cause an accident or injury ESU13
127. stra tion The longer distance A is the higher the spring preload the shorter distance A is the lower the spring preload Spring preload setting Minimum soft RST90 111 5 mm 4 39 in RST90GT 122 1 mm 4 81 in Standard RST90 112 5 mm 4 43 in RST9O0GT 122 1 mm 4 81 in Maximum hard RST90 122 5 mm 4 82 in RST9OGT 132 1 mm 5 20 in Distance A changes 1 5 mm 0 06 in with each full turn of the adjusting nut 3 Tighten the locknut to the specified torque NOTICE Always tighten the locknut against the adjusting nut and then tighten the locknut to the speci fied torque jecsooseo 40 Tightening torque Locknut 42 Nm 4 2 m kgf 30 ft Ibf Rear torsion springs EWS00750 n The left and right spring preloads must be adjusted to the same setting Uneven set tings can cause poor handling and loss of stability To increase the spring preload and thereby harden the suspension turn the adjuster in di rection a To decrease the spring preload and thereby soften the suspension turn the adjuster in direction b 1 Spring preload adjuster Spring preload setting Minimum soft S Standard M Maximum hard H ESU10985 Adjusting the spring preload of the rear shock absorber RS90GT RS90LTGT The spring preload can be adjusted by turning the adjusting ring on the rear shock absorber To increase the spring preload and thereby harden the suspension
128. t me d allumage par tincelle de v hicule respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada 3JK 82377 10 CERTIFIED CE MOD LE A ETE VALU PAR UN LABORATOIRE D ESSAIS IND PENDANT ET SATISFAIT TOUTES LES NORMES DE S CURIT DU SSCC EN VIGUEUR LA DATE DE FABRICATION PARRAINE PAR LE COMIT DE SECURITE ET DE CERTIFICA TION DE LA MOTONEIGE INC 4 5 z E E CERTIFI THIS MODEL HAS BEEN EVALUATED BY AN INDE PENDENT TESTING LABOR ATORY AND IT MEETS ALL SSCC SAFETY STANDARDS IN EFFECT ON THE DATE OF ITS MANUFACTURE SPONSORED BY THE SNOWMO BILE SAFETY AND CERTIFICA TION COMMITTEE INC 88C 77769 00 9 RS90GT RS9OLTGT SHIFTING INSTRUCTIONS Shift only with the machine stopped and tho engine at idle speed Pull the shift lever out then slide it to the forward FWD or reverse REV position until it stops Release the lever PASSAGE DES RAPPORTS Ne changer de rapport que lorsque le v hicule est l arr t et que le moteur tourne au ralenti Tirer le s lecteur puis le pousser fond vers l avant position de marche avant FWD ou le tirer fond vers l arri re position de marche arri re REV Relacher le_s lecteur SHIFTING INSTRUCTIONS Shift only with the machine stopped and tho engine at idle speed Pull the shift lever out then slide it to the forward FWD or reverse REV position until it stops Release the lev
129. t should be operated by an experienced ope Set parking brake before attempting to start engine Never run this vehicle with the parking brake applied ole To stop engine in an emergency push the engine stop switch down Ne Do nat operate engine without drive belt or drive guard Make sure the fuel tank cap is closed securely after refueling Do not operate this vehicle on public roads You could collide with another vehicle This vehicle is designed for operator only no passengers e Check lever position Forward or Reverse before moving Ne snowmobiling Sassurer que le bouchon du r servoir soit bien referm Afin d viter tout risque de collision ne pas rouler sur un chemin public D VITER TOUT RISQUE DE BLESSURE SERIEUSE OU MEME MORTELLE VEUILLEZ SUIVRE LES RECOMMANDATIONS SUIVANTES Read the Owner Manual and al labels before operating this vehicle Avant uit ce vee re le manuel du propri taire et toutes es tiquettes v hicule est une machine haute performance per Ele doit tre conduite par un conducteu experiment Check throttle brake and steering for proper spin tre Starting engine pyn den le moteur v rifier l op ration du a de l acc l rateur et de la direction frein de S curit doit tre appliqu lors du d marage pas rouler avec le frein de s curit actioni 2 En cas d urgence use Interrupteur dards moteur pas lasser tourner le moteur sans la cou
130. t side cov er See the above procedures 2 Remove the plastic band that is holding the auxiliary DC lead and then discon nect the auxiliary DC jack coupler 1 Fastener 2 Left side cover To install a side cover CR LT AC 1 Fit the projection on the rear of the side IS cover into the hole in the fuel tank cover LD 1 Auxiliary DC jack coupler 3 Remove the screws and then remove the cable guide 2 Fit the projections on the side cover into the slots as shown 1 Screw 2 Cable guide 4 Loosen the quick fastener screws 3 Tighten the fasteners 4 Install the shroud 64 Periodic maintenance and adjustment Quick fastener screw 2 Top cover 5 Lift up the rear of the top cover discon nect the main switch coupler and then remove the cover tes 2 IR Sse Non VON j 1 Top cover 2 Main switch coupler To install the top cover 1 Connect the main switch coupler 2 Place the top cover in the original posi tion making sure to fit the projections on the cover into the slots in the headlight unit 1 Top cover 3 Tighten the quick fastener screws 4 Pass the brake hose throttle cable park ing brake cable and wire harness through the cable guide place the cable guide in the original position and then install the screws 1 Cable guide 5 Connect the auxiliary DC jack coupler and then fasten the auxiliar
131. t unit bolt on each side of the snowmobile 1 Headlight unit bolt 4 Unhook the headlight unit as shown then lift it up and move it forward away from the handlebar NOTICE Be careful not to scratch the snowmobile when mov ing the headlight unit 0500920 1 Headlight unit Standard engine idling speed 1300 1500 r min 5 Loosen the locknut 5 Close the shroud 69 Periodic maintenance and adjustment 6 To increase the throttle lever free play turn the adjusting bolt in direction a To decrease the throttle lever free play turn the adjusting bolt in direction b 1 Locknut 2 Throttle lever free play adjusting bolt 3 Throttle lever free play Throttle lever free play 2 0 3 0 mm 0 08 0 12 in 7 Tighten the locknut 8 Install the headlight unit making sure to fit the slots on its bottom onto the projec tions on its stay 70 1 Slot 2 Projection 9 Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover 1 Weatherstrip 10 Install the headlight unit bolts and then tighten them to the specified torque Tightening torque Headlight unit bolt 3 0 Nm 0 30 m kgf 2 2 ft lbf 11 Install the top cover the left and right side covers and the shroud RST90 ECS00410 NOTICE Be sure to adjust the engine idling speed first 1 Place the snowmobile on a level surface and apply the parking brake 2 Open the shroud
132. tection TRIP is included at no extra cost TRIP gives you up to 150 reimbursement per occurrence for any reasonable expenses you incur because your Yamaha needs cov ered service replacement vehicle rental emergency towing phone calls even food and lodging when you are away from home This superb coverage goes into effect when you purchase Y E S so it applies to any war ranty repairs as well as covered repairs dur ing your entire Y E S plan period e Y E S coverage is honored at any authorized Yamaha dealer nationwide e Y E S coverage is transferable to a new owner if you sell or trade in That can make your Yamaha much more valuable 130 This excellent Y E S plan coverage is only avail able to Yamaha owners like you and only while your Yamaha is still within the Yamaha Limited Warranty period So visit your authorized Yamaha dealer to get all the facts He can show you how easy it is to protect your investment with Yamaha Extended Service We urge you to act now You ll get the excellent benefits of TRIP coverage right away and you ll rest easy knowing you ll have strong factory backed protection even after your Yamaha Lim ited Warranty expires See your dealer today A special note If visiting your dealer isn t convenient contact Yamaha toll free at 1 866 937 3983 866 YES EXTD or visit our web site All you need to do is provide your vehicle s Primary ID number your Tunnel number We ll be hap
133. the engine 17 Control functions ESU14040 Fuel meter and grip thumb warmer level indicator RS90GT RS90LTGT RST90GT The fuel meter and grip thumb warmer level indicator have eight segments which show the amount of fuel remaining in the fuel tank the grip warmer level or the thumb warmer level 1 Fuel meter and grip thumb warmer level in dicator Fuel meter The display segments of the fuel meter disap pear towards E Empty as the fuel level de creases When only one segment is left near E the fuel level warning indicator and the warning light come on j 1 Fuel level warning indicator gy 2 Warning light A If the fuel level warning indicator and the warning light come on refuel as soon as pos sible 18 TIP The snowmobile must be stopped on a level surface to obtain an accurate fuel meter read ing since the reading changes according to the movement and inclination of the snowmo bile Grip thumb warmer level indicator When the grip warmer side of the grip thumb warmer adjusting switch is pressed the grip warmer indicator comes on and the display switches to the grip warmer level When the thumb warmer side of the grip thumb warmer adjusting switch is pressed the thumb warmer indicator comes on and the display switches to the thumb warmer level See Grip thumb warmer adjusting switch on page 23 for detailed informa
134. tion 1 Grip warmer indicator 5 2 Thumb warmer indicator amp amp TIP e The grip thumb warmer level is displayed for 5 seconds after releasing the grip thumb warmer adjusting switch then the display switches to the fuel meter e When the engine is started the grip thumb warmer levels are set to the levels selected when the engine was last stopped RST90 The fuel meter and grip thumb warmer level indicator have eight segments which show the amount of fuel remaining in the fuel tank the grip warmer level or the thumb warmer level Pt py pl PTE EE FFR EEE AF 1 Fuel meter and grip thumb warmer level in dicator Fuel meter The display segments of the fuel meter disap pear towards E Empty as the fuel level de creases When only one segment is left near E the fuel level warning indicator and the warning light come on Control functions SOS say n IE N Fuel level warning indicator jg gt Warning light A If the fuel level warning indicator and the warning light come on refuel as soon as pos sible TIP The snowmobile must be stopped on a level surface to obtain an accurate fuel meter read ing since the reading changes according to the movement and inclination of the snowmo bile Grip thumb warmer level indicator When the grip warmer adjusting switch is pressed the grip warmer indicator com
135. tion is incorrect adjust it by removing or adding a spacer on each V belt position adjusting bolt 1 V belt 89 Periodic maintenance and adjustment 1 V belt position adjusting bolt 2 Spacer V belt position Adjustment More than 1 5 mm 0 06 in above the edge Remove a spacer From 1 5 mm 0 06 in above the edge to 0 5 mm 0 02 in below the edge Not necessary it is correct More than 0 5 mm 0 02 in below the edge Add a spacer 9 Tighten the V belt position adjusting bolts V belt position adjusting bolt tightening torque 10 Nm 1 0 m kgf 7 2 ft lbf 10 Install the V belt over the primary sheave assembly 90 11 Rotate the secondary sliding sheave clockwise and push it so that it separates from the secondary fixed sheave Secondary sliding sheave 2 Secondary fixed sheave 13 Install the V belt between the secondary sliding and fixed sheaves Place the left lower cover in the original position and then install the screws RS90GT RS9OLTGT RST90GT Periodic maintenance and adjustment RS90GT RS90LTGT RSTI0GT Left lower cover Install the drive guard and then install the left side cover and the shroud RS90GT RS90LTGT RST90GT or close the shroud RST90 ESU13922 Drive chain housing To check the drive chain housing oil level 1 Place the snowmobile on a level surface
136. to the red connecting lead and the black jumper cable to the black connecting lead Do not re verse the connections tecsovse1 4 Pull the red connecting lead cover to expose the terminal through the slit in the cover and then connect the red jump er cable to the red connecting lead 117 Troubleshooting Connect the other end of the red jumper cable to the positive terminal of the booster battery Connect the black jumper cable to the negative terminal of the booster bat tery Pull the black connecting lead cover to expose the terminal through the slit in the cover and then connect the black jumper cable to the black connecting lead 118 8 Start the engine 9 Disconnect the black jumper cable from the black connecting lead and then pull the cover completely over the lead terminal Disconnect the black jumper cable from the negative terminal of the bat tery used to jump start the engine Disconnect the red jumper cable from the positive terminal of the battery used to jump start the engine Disconnect the red jumper cable from the red connecting lead and then pull the cover completely over the lead termi nal Install the red connecting lead into the lead holder Install the right side cover and the shroud RS90GT RS9IOLTGT RST90GT or close the shroud RST90 10 11
137. u approach a hill ac celerate before you start the climb and then reduce the throttle to prevent track slippage It is also important to keep your weight on the uphill side at all times On climbs straight up the hill this can be accomplished by leaning forward and on steeper inclines standing on the running boards and leaning forward over the handlebar Also see Traversing a slope 52 Slow down as you reach the crest of the hill and be prepared to react to obstacles sharp drops or other vehicles or people which may be on the other side If you are unable to con tinue up a hill do not spin the track Stop the engine and set the parking brake Then pull the rear of the snowmobile around to point the snowmobile back down the hill When the snowmobile is pointed downhill mount your snowmobile from the uphill side Restart the engine release the parking brake and de scend the hill Riding downhill EWS00240 Use extra caution when applying the brake during a descent Excessive braking will cause the drive track to lock causing a loss of control When riding downhill keep speed to a mini mum It is important to apply just enough throttle to keep the clutch engaged while de scending the hill This will allow you to use en gine compression to help slow the snowmobile and to keep the snowmobile from rolling freely down the hill Also apply the brake frequently with light pressure Traversing a slope
138. uard rearward to remove it To install the drive guard 1 Fit the front slots in the drive guard over the projections on the drive guard front holder 28 1 Drive guard 2 Align the slots in the rear of the drive guard with the projections on the drive guard rear holder and then insert the drive guard locking pin into the holder as shown 1 Drive guard 2 Drive guard locking pin ESU10761 V belt holders Keep a spare V belt for emergency use by placing it into the V belt holders provided RS90GT RS90LTGT RST90GT RST90 1 V belt holder ECS00180 NOTICE Make sure that the V belt is installed se curely in the holders ESU13302 Passenger grips RST90GT The passenger grips can be installed in three different positions to suit the passengers preference Control functions 1 Passenger grip 2 Passenger grip adjusting knob To change the passenger grip posi tion 1 Remove the passenger grip adjusting knob by turning it counterclockwise 2 Move the passenger grip to the desired position 3 Install the adjusting knob by turning it clockwise EWS00780 Make sure that the passenger grip adjust ing knobs are securely tightened after changing the positions of the passenger grips ESU10681 Passenger grip warmer switch RST90 RST90GT The passenger grip warmer switch controls the electrically heated passenger grips 29 Control functions 1 Passe
139. ure the low coolant temperature indi cator light has gone out before operation See page 17 for detailed information about the indicator light ESU11310 Break in There is never a more important period in the life of your engine than the period between 0 and 500 km 300 mi For this reason you should read the following material carefully Since the engine is brand new do not put an excessive load on it for the first 500 km 300 mi The various parts in the engine wear and polish themselves to the correct operating clearances During this period prolonged full throttle operation or any condition that might result in engine overheating must be avoided Operating your snowmobile for the first time Start the engine and let it idle for 15 minutes 0 160 km 0 100 mi Avoid prolonged operation above 6000 r min 160 500 km 100 300 mi Avoid prolonged operation above 8000 r min 500 km 300 mi and beyond The snowmobile can now be operated nor mally 50 ECS00340 NOTICE e After 800 km 500 mi of operation the engine oil must be changed and the oil filter cartridge replaced e If any engine trouble should occur dur ing the engine break in period immedi ately have a Yamaha dealer check the snowmobile ESU11333 Riding your snowmobile Getting to know your snowmobile EWS00211 To avoid severe injury or death e Keep both hands on the handlebar dur ing operation e Never put your feet outside the running boa
140. urning For most snow surfaces body English is the key to turning As you approach a curve slow down and be gin to turn the handlebar in the desired direc tion As you do so put your weight on the running board to the inside of the turn and lean your upper body into the turn This procedure should be practiced at low speeds many times in a large flat area with no obstacles Once you have learned this tech nique you should be able to perform it at high er speeds or in tighter curves Lean more as the turn gets sharper or is made at higher speeds 51 Operation Improper riding techniques such as abrupt throttle changes excessive braking incorrect body movements or too much speed for the sharpness of the turn may cause the snow mobile to tip If your snowmobile begins to tip while turning lean more into the turn to regain balance If necessary gradually let off on the throttle or steer to the outside of the turn Remember Avoid higher speeds until you are thoroughly familiar with the operation of your snowmo bile Riding uphill EWS00231 Operation on slopes can lead to loss of control if proper techniques are not used Follow these instructions to reduce your risk of an accident Do not try steeper or more difficult inclines until you have de veloped your skill on gentle slopes You should practice first on gentle slopes Try more difficult climbs only after you have de veloped your skill As yo
141. warm it up for several minutes and then turn it off 17 Remove the oil filler cap and then add sufficient oil of the recommended type to raise it to the H level mark on the dip 82 stick NOTICE When adding the en gine oil be careful not to fill above the H level mark on the dipstick Use only the recommended oil See page 122 Make sure that no foreign materi al enters the engine oil tank cs00462 RS90GT RS9OLTGT RST90GT H 1 2 i i 1 H level mark 2 L level mark RST90 1 H level mark 2 L level mark Periodic maintenance and adjustment Recommended engine oil See page 122 Oil quantity With oil filter cartridge replacement RS90GT 3 3 L 3 49 US qt 2 90 Imp qt RS9OLTGT 3 3 L 3 49 US at 2 90 Imp qt RST90 3 0 L 3 17 US qt 2 64 Imp qt RST90GT 3 3 L 3 49 US qt 2 90 Imp qt Without oil filter cartridge replace ment RS90GT 3 1 L 3 28 US qt 2 73 Imp qt RS9OLTGT 3 1 L 3 28 US at 2 73 Imp qt RST90 2 8 L 2 96 US qt 2 46 Imp qt RST9OGT 3 1 L 3 28 US qt 2 73 Imp qt Total amount 18 19 20 RS90GT 4 0 L 4 23 US qt 3 52 Imp qt RS9OLTGT 4 0 L 4 23 US at 3 52 Imp qt RST90 3 7 L 3 91 US qt 3 26 Imp qt RST9OGT 4 0 L 4 23 US qt 3 52 Imp qt Install and tighten the oil filler cap Start the engine and then let it idle for several minutes while checking it for oil leakage If oil is leaking i
142. with the warning indicators e a fuel meter which shows the fuel remain ing in the fuel tank e a grip thumb warmer level indicator which shows the grip warmer level or the thumb warmer level After the engine is started the tachometer needle makes one sweep and the low cool ant temperature indicator light the warning light and all segments of the meter unit dis play come on and go off 1 Tachometer Low coolant temperature indicator light F High beam indicator light D Warning light A Warning indicators Meter display 7 Select reset button D Oo O1 Ww The grip warmer level is initially displayed for 5 seconds then the display switches to the fuel meter 16 TIP To switch the speedometer odometer and tripmeter displays between kilometers and miles select the odometer mode ODO and then push the select reset button for at least 10 seconds while the snowmobile is stopped Odometer and tripmeter modes Pushing the select reset button switches the display between the odometer mode ODO and the tripmeter mode TRIP in the following order ODO gt TRIP gt ODO S806 pny ED AHO JUR zi fee GGA H 1 Odometer tripmeter To reset the tripmeter push the select reset button for at least 1 second while the tripmeter is displayed ESU10411 High beam indicator light The high beam indicator light comes on when t
143. wly and cautiously Avoid accelerating turning and braking rapidly Steering is minimal and uncon trolled spins are an ever present danger Operating on ice or icy surfaces can be very dangerous Traction for turning stopping and starting is much less than that on snow Hard packed snow It can be more difficult to negotiate on hard packed snow as both the skis and drive track do not have as much traction as when the snowmobile is operated on fresh snow Avoid rapid acceleration turning and braking Operation on surfaces other than snow or ice Operation of your snowmobile on surfaces other than snow or ice should be avoided Op eration under such conditions will damage or result in rapid wear of the ski runners drive track slide runners and drive sprockets Op eration of the snowmobile on the following surfaces should be avoided at all times e Dirt 53 Operation e Sand e Rocks e Grass e Bare pavement Other surfaces that should be avoided for the sake of drive track and slide runner life are e Glare ice surfaces e Snow mixed with a lot of dirt and sand All of the above surfaces have one thing in common in regard to drive track and slide run ners little or no lubricating ability Drive track and all slide rail systems require lubrication snow or water between the slide runners and the slide metal In the absence of lubrica tion the slide runners will rapidly wear and in severe cases literally melt awa
144. y and the drive track will be subject to damage or failure Also traction aids such as studs cleats etc may cause further track damage or failure EWS00280 Drive track damage or failure could result in loss of braking ability and snowmobile control which could cause an accident e Always check the drive track for damage or maladjustment before operating the snowmobile e Do not operate the snowmobile if you find damage to the drive track ECS00350 NOTICE Ride on fresh snow frequently Operating on ice or hard packed snow will rapidly wear the slide runners ESU11350 Maximizing drive track life Recommendations Track tension During initial break in the new drive track will tend to stretch quickly as the track settles Be sure to correct the track tension and align 54 ment frequently See page 98 for adjustment procedures A loose track can slip ratchet derail or catch on suspension parts causing severe damage Do not overtighten the drive track otherwise it may increase the friction between the track and the slide runners re sulting in the rapid wear of both components Also this may put an excessive load on the suspension components resulting in compo nent failure Marginal snow The drive track and the slide runners are lubri cated and cooled by snow and water To pre vent the drive track and slide runners from overheating avoid sustained high speed us age in areas such as icy trails frozen l
145. y DC jack lead with the plastic band 6 Install the left side cover and the shroud ECS00372 NOTICE e Make sure that all cables hoses and leads are routed properly before install ing the shroud and covers e When installing the shroud and covers be sure to tighten the fasteners secure ly 65 Periodic maintenance and adjustment Top cover RST90GT To remove the top cover 1 Remove the shroud and the left side cov er See the above procedures 2 Disconnect the auxiliary DC jack coupler 1 Windshield stay rubber cover 5 Loosen the quick fastener screws 6 Lift up the rear of the top cover discon nect the main switch coupler and then remove the cover Auxiliary DC jack coupler 3 Open the zippers on the left and right sides of the handlebar cover and then re move the cover 1 Top cover 2 Main switch coupler To install the top cover 1 Connect the main switch coupler 1 Handlebar cover 2 Place the top cover in the original posi 2 Quick fastener screw tion making sure to fit the projections on 4 Pull the windshield stay rubber covers the cover into the slots in the headlight upward unit 66 Periodic maintenance and adjustment 3 Tighten the quick fastener screws 4 Place the windshield stay rubber covers in their original position 5 Install the handlebar cover 6 Connect the auxiliary DC jack coupler 7 Install the left side cover and
146. y service TIP Use the special wrench included in the own ers tool kit to make the suspension adjust ments If the tool kit for your model does not include the special wrench the special wrench can be obtained at a Yamaha dealer ESU10894 Adjusting the spring preload of the front shock absorbers EWS00720 The spring preload of the left and right shock absorbers must be adjusted to the same setting Uneven settings can cause poor handling and loss of stability The spring preload can be adjusted by turning the adjusting nuts Adjust the spring preload as follows 1 Loosen the locknut 37 Control functions 2 To increase the spring preload and there by harden the suspension turn the ad justing nut in direction a To decrease the spring preload and thereby soften the suspension turn the adjusting nut in di rection b RS90GT RS9OLTGT RST90GT 1 Locknut 2 Distance A 3 Spring preload adjusting nut RST90 1 Locknut 2 Distance A 3 Spring preload adjusting nut TIP The spring preload setting is determined by measuring distance A shown in the illustra tion The longer distance A is the higher the spring preload the shorter distance A is the lower the spring preload 38 Spring preload setting Minimum soft RS90GT RS9OLTGT 119 0 mm 4 69 in RST90 161 0 mm 6 34 in RST90GT 122 6 mm 4 83 in Standard RS90GT RS9OLTGT 119 0 mm 4 69 in

Yamaha RS90LTGTA Offroad Vehicle User Manual

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