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1. Blow it off with compressed air and or use a soft bristle paintbrush to remove dust and dirt from the chassis e Use your fuel bottle to remove any remaining fuel out of the fuel tank e Ifthe model is going to be stored for an extended time period unplug the receiver battery and remove the batteries from the transmitter Tuning Adjusting and Maintaining the Speed NT Periodically examine your Speed NT for the following Keep your vehicle clean using a brush to remove dirt and dust Look for cracks in the suspension arms and other molded parts Check that the tires are still glued to the wheels Check that all the wheel bearings are clean and lubricated Using your tools attempt to tighten all the screws and nuts e Verify that the Chamber Links and Steering linkage are not bent Check that the Toe and Chamber settings are as desired and equal Check the Drivetrain o Check the Spur gear for wear o Check the Pinion gear o Check the Slipper Pads for wear e Take the shocks off the vehicle and check especially if they appear to be leaking as it is time to rebuild them Look over all the wiring and connections for bare wire or any place which could lead to a short circuit e Turnon the radio and if the Green LED is off or dim replace the 4 AA batteries in the transmitter After you become familiar with driving your Speed NT you may need to reset or make adjustments for better driving performa
2. Printed 06 09 16265 Not responsible for errors All prices subject to change without notice Losi a Division of Horizon Hobby Inc Introduction Thank you for choosing the Speed NT This is a highly developed RC model that features a sophisticated radio system and a nitro fuel powered engine It does require some mechanical experience and direct adult supervision This guide contains the basic instructions and drawings needed to operate and maintain your new Speed NT Please take the time to read through these instructions completely before attempting to run your new model Your hobby dealer cannot under any circumstances accept a model for return or exchange that has been run We are confident you will be satisfied with the high speed performance in this durable and resilient vehicle Understanding that you are anxiously wanting to get your Speed NT ready for the open road it will be to your long term benefit to make the effort and read through the entire manual In the following pages you will find all the information you will need to set up as well as operate your new Speed NT to its full potential F a Losi Horizon Support If you have any questions concerning setup or operation of your Speed NT RC vehicle please call Horizon Customer Support at 1 877 504 0233 Hours Monday thru Friday from 8 00am CST to 5 00pm CST You are welcome to call us with any support issue or question you may have about the Speed
3. NT Getting Ready Thoroughly read all the enclosed material precautions and follow instructions to avoid damaging your new RC vehicle If you choose to not follow these steps or instructions it will be considered negligence If after review of this manual and prior to running your Speed NT you determine this RC vehicle is not what you want DO NOT proceed and DO NOT run the Speed NT If the Spoeed NT has been run your local hobby shop will not be able to process a return or accept it for exchange If you are an experienced RC hobbyist or new to RC vehicles it will benefit you to read all enclosed information From everyone at Losi we would like to thank you again for choosing the Speed NT Our goal is helping people have fun Caution and enjoy using our products Register your Losi Product Online Register your Speed NT now and be the first to find out about the latest options parts product updates and more Log on to www LOSI com and follow the product registration link to stay connected Age Recommendation 14 years or over This is not a toy This product is not intended for use by children without direct adult supervision This vehicle is capable of extreme speed and careful attention and care must be used when operating the Speed NT When driving the Speed NT it is important that you take measures to avoid someone being hit by the vehicle You may cause serious injury to another person or to personal propert
4. Speed NT more stable and keep the front end flatter This works well on higher traction surfaces Removing washers will make the steering more aggressive which works well on lower traction surfaces This can be good in some conditions but can also make the Speed NT difficult to drive in others The best all around adjustment is with three washers as the vehicle comes built The washers that are used are included in an assortment package of washers LOSA6350 16 F a Outboard Camber Location In addition to the inboard camber location the Speed NT also provides outboard three mounting options The middle location is the most used as it provides the best and most consistent handling on different surfaces The outer location also helps the Speed NT stay tighter in turns with a more precise steering feel Moving the link to the inner hole will make the steering react slightly slower and steer smoother The advantage to the inner hole is that it can increase on power steering and help the Speed NT get through bumps better Toe In Out This is the parallel relationship of the front tires to one another Toe in out adjustments are made by changing the overall length of the steering tie rods Toe in the front of the tires point inward to a point in front of the front axle will make the Speed NT react a little slower but have more steering from the middle of the turn out The opposite is true with toe out the front of the tires point
5. air temperature but in general it should be in the 190 to 230 F 88 to 110 C range Since the Speed NT has a head protector you will have to rely on your ears or preferably a remote temperature gauge like the Losi Temp Tuner LOSA99171 which incorporates an infrared temp sensor gauge and a handy carburetor tuning screwdriver If the engine is overheating turn the high speed needle out counter clockwise at least two hours If the engine is running rich below 190 F turn the high speed needle in clockwise one hour at a time until it is running within the normal range Driving the Speed NT Always follow these precautions when running your Speed NT The electronics in this model are not waterproof and you must avoid running it in or through standing water wet grass mud or snow Do not run the Speed NT at dusk or in the dark when visibility is limited Do not attempt to run this model if it will be out of sight for any amount of time Do not run this model near a crowd of people Always check for proper radio function and battery condition before operating Check to make sure that the tires are securely glued to the rims Check the model thoroughly for loose nuts bolts and screws before and after running Make sure you use proper dirt tires if running off road Never run the model with old or discharged batteries especially dry cells in the model If the model gets stuck do not pull the throttle as it may
6. be operated with caution and common sense and requires some basic mechanical ability Failure to operate this Product in a safe and responsible manner could result in injury or damage to the Product or other property This Product is not intended for use by children without direct adult supervision The Product manual contains instructions for safety operation and maintenance It is essential to read and follow all the instructions and warnings in the manual prior to assembly setup or use in order to operate correctly and avoid damage or injury Questions Assistance and Repairs Your local hobby store and or place of purchase cannot provide warranty support or repair Once assembly setup or use of the Product has been started you must contact Horizon directly This will enable Horizon to better answer your questions and service you in the event that you may need any assistance For questions or assistance please direct your email to productsupport horizonhobby com or call 877 504 0233 toll free to speak to a service technician Inspection or Repairs If this Product needs to be inspected or repaired please call for a Return Merchandise Authorization RMA Pack the Product securely using a shipping carton Please note that original boxes may be included but are not designed to withstand the rigors of shipping without additional protection Ship via a carrier that provides tracking and insurance for lost or damaged parcels as Hori
7. crankshaft making sure to Save all shims and spacers Remove the clutch bell remove the two bearings and install them in the new clutch bell Install the clutch bell onto the crank pilot shaft and replace the shims and cap screw Replace the engine installing the four 5 40 screws from beneath as well as the throttle link and pipe mount screw Adjusting the Gear Mesh a Motor Mounts Screws for Making Adjustments vi ed S i lek P AERE TA yee As seen in the photo above the motor can be moved forward and back to allow for multiple gear ratios and maintain a good gear mesh You don t want these gears too tight and you definitely don t want them too loose 1 Slightly loosen the four 5 40 screws at the bottom of the chassis that secure the engine Slide the engine back so that the gears are meshing Insert a piece of paper folded over double or a thin business card between the gears as seen in the photo SNT setting the gear mesh 2 Tighten two of the four 5 40 mounting screws while applying slight pressure on the engine Remove the paper and check the mesh If the gears roll smoothly without binding or slapping back and forth retighten the other 5 40 screws If not start over at 1 2 Speed Adjustment Although pre set at the factory the two speed can be adjusted to shift at the point that suits you best Under normal circumstances it should shift well before the engine r
8. mounting of the tire periodically to ensure proper Check all wires radio system battery connectors and the performance and handling battery pack Steering Assembly Occasionally check the steering assembly and you may notice increased looseness There are several Engine will not start components which will wear out from use tie rod ends part 1 Check the igniter by attaching it to a new glow plug If the LOSA6074 the servo saver part LOSA1610 the bellcrank glow plug element does not glow bright red the igniter bushings part LOSA1620 and the drag link ball ends needs to be charged LOSA6074 You can easily replace these components to restore 2 Remove and check the glow plug by attaching it to the factory specifications igniter If it does not glow red attach a new glow plug to the igniter if the new plug glows red install it in the Note The bellcrank bushings may be replaced with engine If it does not glow red recharge the igniter and ball bearings part LOSA691 2 repeat the test a 3 Make sure there is fuel in the tank 4 Check the fuel line for holes or cuts 5 Note that the fuel is getting up to the carburetor If not wait for the exhaust pipe to cool and put your finger over the exhaust tip and turn the engine over watching for the fuel to go up the fuel line until it gets to the carburetor Do not continue to turn the engine over with your finger over the exhaust tip after the fuel has reached the carburetor 6 Ift
9. of simple user errors or minor Radio system does not work properly If the power light on the transmitter is not turning on first ensure the batteries are installed correctly You should also check that the batteries are good and or if rechargeable are fully charged Replace them if needed If the power light is blinking then the transmitter batteries are weak and should be replaced If the transmitter light is on but the radio is still not responding you may need to re bind the transmitter to the Wheels and Tires The tires come pre mounted with the vehicle and should be checked to make certain they stay glued to the wheels The wheel spinning speeds this vehicle is capable of tend to pull the rubber tire away from the rim When a tire or tires come loose from the rim you will notice the vehicle is hard to control Tip the vehicle on its side and using both hands to hold one receiver Please see page 16 wheel at a time use your thumb to press the tire away from the rim If you see a tire pull away from the rim use Losi Tire Glue Short radio range LOSA7880 thick or LOSA7881 thin to re glue It only takes a small drop of glue generally Be careful this is CA type glue and you do not want to glue your fingers to the wheel and tire If the radio range appears short make sure the batteries are all fully charged and or are in good condition Use safety goggles when gluing tires Steering or Throttle servo does not work Check the
10. outward coming to a point behind the front axle the Speed NT will turn into the corner better but with a decrease in steering from the middle of the turn out Toe in will help the Speed NT to track better on long straight high speed runs where toe out has a tendency to make the Speed NT wander We recommend to run between 0 degree of toe in out to 1 degree of toe in Bump n Out Bump out front of the front tires toe outward under suspension compression will result in more off power steering and less consistent handling if you have too much bump out This effect is obtained by adding washers under the steering spindle ball stud Bump in front of the front tires toe inward under suspension compression will result in less off power steering and running Too much bump in can make the steering feel very inconsistent This effect is obtained by installing a ball stud washer on the bottom of the spindle Testing has shown that running a little bit of bump in kit setup in the Soeed NT offers the best overall setup Caster This is the angle of the kingpin from vertical when viewed from the side of the Soeed NT The Soeed NT comes equipped with 30 degree spindle carriers and a 30 degree kick up angle Total caster is determined by adding the amount of kick up Speed NT has 30 degrees and the kingpin angle of the front spindle carriers Increasing total caster will provide more steering entering a turn but less on exit Decreasing total
11. Notes 2009 Losi A division of Horizon Hobby Inc Not responsible for typographical errors All pricing subject to change without notice 800 0397 est
12. billed a minimum of 1 2 hour of labor In addition you will be billed for return freight Please advise us of your preferred method of payment Horizon accepts money orders and cashiers checks as well as Visa MasterCard American Express and Discover cards If you choose to pay by credit card please include your credit card number and expiration date Any repair left unpaid or unclaimed after 90 days will be considered abandoned and will be disposed of accordingly Please note non warranty repair is only available on electronics and model engines United States Electronics and engines requiring inspection or repair should be shipped to the following address Horizon Service Center 4105 Fieldstone Road Champaign Illinois 61822 USA All other Products requiring warranty inspection or repair should be shipped to the following address Horizon Product Support 4105 Fieldstone Road Champaign Illinois 61822 USA Please call 877 504 0233 or e mail us at productsupport horizonhobby com with any questions or concerns regarding this product or warranty United Kingdom Electronics and engines requiring inspection or repair should be shipped to the following address Horizon Hobby UK Units 1 4 Ployters Rd Staple Tye Harlow Essex CM18 7NS United Kingdom Please call 44 0 1279 641 097 or e mail us at sales horizonhobby co uk with any questions or concerns regarding this product or warranty I a CE Compliance Inf
13. caster will cause the steering to react faster and increase on power steering Tuning the Rear End of the Speed NT Shock Location Moving the shocks out on the arm will result in less forward traction and let the Soeed NT make more of an arc through the exit of the turn In general when changing shock locations on the arm it will be necessary to go down one spring rate when moving out on the arm Static Camber Having the same definition as for the front end and measured in the same fashion rear camber can also be a critical tuning feature Testing has shown that running a small amount of negative camber 5 1 degree is best Increasing negative rear camber in the range of 1 5 3 degrees will increase stability and traction in corners but decrease high speed stability Decreasing rear camber in the range of 0 1 5 degrees will decrease stability and traction in corners but will increase high speed stability Inboard Camber Location The Speed NT has multiple rear camber locations Using a longer camber link will improve stability and traction grip Using a shorter camber link will increase steering while decreasing rear grip Running the camber link in the inside position on the shock tower will give your Speed NT more steering entering the turn as it will let the Speed NT set over the rear tire and give you more forward traction exiting the turn As you move the camber link towards the outside of the Speed NT you will gain less
14. e Losi DSM radio installed in the Soeed NT is a state of the art system featuring the latest technology that requires no crystals This system includes all the features you may find useful Be sure to read through the Radio operation instructions on what and how to use these features The following is a simple guide to items and functions commonly referred to Steering Wheel Controls the trucks direction left right Throttle Trigger Controls the speed and braking pull for throttle and push forward for brakes Throttle Trim TH TRIM Allows you to set the idle brake of the truck Steering Trim ST TRIM Adjusts the hands off direction of the truck Transmitter Antenna Transmits signal to the receiver in the truck Servo Reversing Switches Changes the direction of servo operation Power amp Signal Indicators LEDs Red left indicates signal strength Green right indicates battery power 8 Power Switch Turns your transmitter ON and OFF 9 Steering Rate ST D R Adjusts how much the wheels turn when steering wheel is turned right left 10 Endpoint Adjustment Pots allow you to adjust the maximum movement of the servos 11 Bottom Cover Removable for installing AA batteries 12 Binding LED Blinks when binding solid indicates binding complete i e w o a Re Binding the Transmitter to the Receiver The Losi DSM radio system included in the Speed NT operates on 2 4GHz and provides 79 different channels which a
15. eaches maximum power The actual distance traveled will vary with the gear ratio and tune of the engine Tightening the adjustment screw turning to the right clockwise will make the two speed shift later Loosening the adjustment screw turning to the left counterclockwise will make the two speed shift later Follow these simple instructions 1 Place the rear of the chassis on a block so the wheels can turn freely Remove the plug at the top right hand side looking from the back toward the front of the transmission case You will see the 2 Speed mechanism through the access hole Photo 1 Roll the sour gear forward until you can see the hex of the black setscrew in the inner rotating hub as seen in photo 2 and skip to Step 5 If the adjustment setscrew is not visible continue on with Step 4 Hold the spur gear and turn the wheels forward slowly stopping when you can see the hex of the black setscrew Insert a 5 64 inch hex wrench into the setscrew Turn the setscrew 2 turn clockwise to make it shift later or Turn the setscrew 2 turn counterclockwise to make it shift sooner Replace the rubber plug Adjusting the Slipper The slipper is a key component of the drivetrain that is designed to help absorb sudden or large impacts that would otherwise stress various drivetrain parts You should never run the Speed NT with the slipper locked completely tight The slipper can also be used as a tuning aid for extr
16. eed does not increase but simply dies the needle is too lean and needs to be richened up by turning the needle counterclockwise one hour before trying again After you have optimized the low speed setting the engine will probably be idling faster You will have to adjust the idle stop screw counterclockwise to slow the engine idle speed down The engine should accelerate at a constant pace without hesitating High Speed Adjustment After initial acceleration the engine should pull at a steady rate while maintaining a two stroke whine and a noticeable trail of smoke If the engine labors and is sluggish with heavy smoke the mixture is too rich and needs to be leaned by turning the high speed needle clockwise in one hour increments until it runs smoothly If the engine isn t smoking or starts to die after acceleration it is too lean and you must richen the mixture by turning the needle counterclockwise Don t be confused by the sound of the engine and the actual performance A leaner mixture will produce an exhaust note with a higher pitch but this does not necessarily mean improved performance as the engine is on the verge of overheating and may incur possible damage Ideally you want to run the engine so that it is on the slightly rich side of optimum This will give you the best combination of speed and engine life CAUTION The engine is too lean and overheating if it accelerates rapidly with a high pitched scream then seems to labor sto
17. emely slick conditions To adjust the slipper start by turning the 1 4 inch adjustment nut clockwise tighten until it gets tight and the spring is compressed Do not over tighten as you will strip the nut Now turn the adjustment nut counterclockwise loosen four 4 full turns This should be a good overall setting Maintenance In addition to the service needs pointed out in this guide you should try to maintain your new Speed NT for proper performance and to prevent wear If dirt gets in the moving parts it can seriously hinder the performance of the model Use compressed air a soft paint brush and or a toothbrush to remove dirt and dust Avoid using solvents if possible as this can actually wash the dirt into bearings and areas not accessible without disassembly causing additional wear We suggest you follow these basic guidelines e Remove as much freestanding dirt and dust as noted above Never leave fuel in the tank for more than a couple of hours e When done running for the day or longer let the engine run out of fuel Remove the air cleaner and spray a little water displacing lubricant or quality after run engine oil into the carburetor and spin the engine over a few seconds e If needed clean and re oil the air cleaner before installing it back on the model e Inspect the chassis for worn broken or binding parts and repair as necessary Storage When you are done running the Speed NT for the day
18. he fuel has been left open or is over 6 months old try replacing the fuel including that in the fuel line Engine is hard to turn over 1 2 Engine tries to start but will not run i 2 If the engine is hard to turn over make sure the battery in your Spin Start is fully charged The engine may be flooded Remove the glow plug turn the model upside down over a rag and turn the engine over Raw fuel should spray out of the glow plug hole Replace the glow plug making sure you replace the small copper gasket that goes on it If the engine is still hard to turn over there may be internal damage See your hobby dealer or call Horizon Hobby Product Support for help Check the glow igniter as noted above Engine may be loaded up with excess fuel inside Count to 5 before trying to start If starting improves repeat until the engine runs and idles Engine may be overheated Let cool open high speed needle 2 hours and retry If the fuel has been left open or is over 6 months old try replacing the fuel including that in the fuel line Read Engine Tuning section for more help Filling Changing the Shock Fluid Hold the plastic shock end in one hand and slide the spring cup at the bottom up compressing the spring While holding the compressed spring between your fingers slide the spring cup off the shock shaft through the open slot in the cup Remove the spring and set it aside While holding the shock body with the shaft point
19. he top of the engine and the exhaust pipe are extremely hot during and after use Use caution not to touch these parts especially when refueling e The engine can be loud especially when run in a confined area If you find the noise objectionable make sure to use ear protection e This model is controlled by a radio signal that is subject to interference from sources outside your control Interference can cause temporary loss of control so it is advised to always keep a safety margin in all directions to avoid collisions e Always operate your model in an open area away from people and cars The potential speed of this model can cause injury or damage Never operate your Speed NT with low transmitter or receiver batteries especially AA dry cells as control and power will be limited Repeated or prolonged use of heavy braking will cause the brakes to overheat and fail Always leave plenty of room for stopping It will take as much room to stop as it does to accelerate to speed Always run in an open area with plenty of braking room MaS E Batteries and Charging The Speed NT uses rechargeable batteries such as NiMH or LiPo These batteries all have special requirements to preserve performance and last a long time Read all instructions and precautions that are provided with the batteries intended to be used in the Speed NT Read all instructions provided by the manufacturer of the batteries Responsible adult s
20. heating as severe damage and premature wear can occur You want to make all carburetor adjustments in one hour increments 1 Idle Stop Screw 2 Low Speed Needle a ee hel te R al gt P 5 F e Carb Adjustments Make all carburetor adjustments in one hour increments Imagine the slot in the needle is the hour hand on a clock Adjust it as though you were moving the hour hand from one hour to the next or previous one Low Speed Adjustment The low speed adjustment affects the idle and slightly off idle performance The optimum setting allows the motor to idle for at least 8 10 seconds The model should then accelerate with a slight amount of sluggishness and a noticeable amount of smoke The simplest way to check this is to make sure the engine has been warmed up and let the engine idle for 8 10 seconds If the low speed mixture is so far off that the engine won t stay running that long turn the idle stop screw clockwise increasing the idle speed With the engine at idle pinch and hold the fuel line near the carburetor cutting off the flow of fuel and listen closely to the engine rpm speed If the low speed needle is set correctly the engine speed will increase only slightly and then die If the engine increases several hundred rpm before stopping the low speed needle is too rich Lean the mixture by turning the needle clockwise one hour and trying again If the engine sp
21. ht nuts should be adjusted evenly You should start with the rear ride height where the Speed NT comes to a rest at a height where the dogbones are slightly below level with the surface The front ride height should be set so that the bottom of the chassis is level with the surface Occasionally you may want to raise the front ride height to get a little quicker steering reaction but be careful as this can also make the Speed NT easily flip over Every driver likes a little different feel so you should try small ride height adjustments to obtain the feel you like This should be one of the last adjustments after everything else has been dialed in tuned Do not use ride height adjustment as a substitute for a change in spring rate If your Speed NT needs a softer or firmer spring change the spring Do not think that simply moving the shock nuts will change the stiffness of the spring it will not F a Camber Rise Relationship The Speed NT setup out of the box Troubleshooting your Speed NT comes with less front camber gain than the rear camber gain hs ao a ee ate camber lets ie ies end adjustments which are easily addressed If after reading below ae a ee i ae sors sie SBY naving you cannot resolve your problem then please call Horizon more camber gain in the rear the Speed NT has more rear Product Support at 1 877 504 0233 traction this helps the rear tires accelerate through the bumps and ruts Many questions are the result
22. ing up turn the plastic hex of the shock cartridge where the shaft enters the shock counter clockwise until it and the shock shaft can be removed If changing the fluid turn the shock body upside down over a garbage can allowing all of the fluid to escape This is agood time to clean the inside of the shock body with LOSI Nitrotec spray cleaner LOSA9921 7 Fill the shock body to the bottom of the threads inside the shock body with LOSI 35wt shock fluid LOSA5225 or if changing the new weight fluid Insert the shaft cartridge assembly with the shock piston against the cartridge into the shock body Slowly tighten turn clockwise the cartridge about two full turns only With the cartridge still slightly loose slowly push the shock shaft into the shock body Fluid will escape around the threads This will bleed the excess fluid out of the shock Once the shaft is all the way down tighten the shock cartridge finger tight With the shaft assembly still pushed all the way in secure the cartridge by tightening with pliers or a 7 16 inch wrench approximately 1 8 to 1 4 of a turn There should be no air in the shocks as you move the shaft in and out If there is you need more fluid If the shock does not compress all the way the shock has too much fluid and you need to loosen the cartridge 1 2 turn and repeat Starting at step 7 A6100 lt HE Shock Diagram A5074 Warranty Information Warranty Period Exclusive Warranty H
23. initial steering however you will gain more steering as the Speed NT exits the turn Outboard Camber Location Running the camber link in the inside position on the hub will generate more rotation entering a turn but decrease steering on exit Running the camber link in the furthest outer position on the hub will generate more stability entering a turn and increase steering on exit Toe In Having the same definition as for the front end the toe in can be adjusted on the Speed NT with the rear hubs The stock toe in is 3 degrees of inboard per side and 0 degrees in the hub Increasing rear toe in will increase forward traction and initial steering but reduce straightaway speed Decreasing rear toe in will decrease forward traction and free up the Speed NT Less toe in can be used to gain top speed LIZ F a Ride Height This is the height of the chassis in relation to the surface It is an adjustment that affects the way your Speed NT jumps turns and goes through bumps To check the ride height drop one end front or rear of the Soeed NT from about a 5 6 inch height onto a flat surface Once the Speed NT settles into a position check the height of that end of the Soeed NT in relationship to the surface To raise the ride height lower the shock adjuster nuts on the shock evenly on the end front or rear of the Soeed NT that you are working on To lower the ride height raise the shock adjuster nuts Both left and rig
24. lat Turnbuckle Wrench Recommended Accessories Small flat blade and Phillips screwdrivers L OSA99167 or Flat blade screwdriver with infrared temperature gauge LOSA99171 Needle nose pliers Quality 050 inch 1 16 inch 5 64 inch 3 32 inch and 1 5mm hex Allen drivers Losi Nitrotane 20 Sport fuel LOSFO020 or LOSFO120 Other fuels may not support the engine warranty Fuel bottle LOSB5201 Glow Igniter LOSB5221 Rechargeable Receiver battery LOSB9951 The Losi Speed NT Overview Wheelie Bar Receiver Battery Box Rear Shock Rear Camber Link Rear Suspension Arm Engine Rear Body Mount Exhaust Header Carburetor Fuel Line Brake Adjuster gt Pressure Line Air Filter Fuel Filler l Throttle Linkage Adjuster Exhaust Pipe Receiver Cover Front Shock Steering Servo Tie Rod Steering Link Front Body Mount Front Camber Link Front Suspension Arm The Losi MTX Pro Radio System Overview Antenna Dual Rate Adjustment ST D R Steering Wheel Steering Trim ST Trim Throttle Trim Power On Off TH Trim Switch Throttle Brake Trigger Steering and Throttle Endpoint Adjustment Pots 4 Bind LED las Auxiliary Channel MRX 3000 WITH Ma a Throttle Channel SPEKTRUM i pim 2 4 GHz DSM aa Steering Channel LOSBO806 Binding Port fle rdel F Speed NT Electronics System Overview About the Radio Th
25. n be made quickly and easily Inboard Camber Location The Speed NT has three different inner locations with vertical adjustment for the front camber tie rod In general the lower or further out the inside position is relative to the outside the more camber gain total camber change through the total throw of the suspension is present This is an adjustment that is difficult to make a generic statement for as it can have slightly different results on various conditions The following is a summary of how this adjustment will usually impact the handling of the Speed NT A longer front camber link will usually make the Speed NT feel stiffer This will help keep the Speed NT flatter with less roll but can make the Speed NT handle worse in bumpy conditions it also will make the Speed NT easier to drive A shorter front camber link will result in more front end roll which will provide more steering on tighter turns with the loss of some stability You will also lose some high speed steering but might gain some more steering response Too short of a front link may make the Speed NT feel twitchy or wandery meaning that it may be difficult to drive Straight at high speed Inboard Camber Vertical Adjustment Washers are often used under the inner ball stud mounting location this is one of the most important adjustments on the Speed NT You should get a feel for how the number of washers affects the handling Adding washers will make the
26. n the correct suspension travel For the inside location a total of 200 inch limiter works great Losi sells a shock spacer set LOSA5050 that includes 030 inch 060 inch 090 inch and 120 inch spacers All of the Camber and Steering Linkages have been assembled in the following way Using the supplied flat metal turnbuckle wrench if you need to SHORTEN any link on the Speed NT rotate the wrench towards the front of the vehicle counterclockwise If you need to LENGTHEN any link then rotate the wrench towards the rear of the vehicle clockwise Static Camber This refers to the angle of the wheels tires relative to the surface viewed from either the front or back Negative camber means that the top of the tire leans in toward the chassis Positive camber means the top of the tire leans out away from the chassis Camber can be precisely measured with after market camber gauges sold at a local hobby shop It can be measured roughly using any square to the ground object by checking the gap between the square edge and the top of the tire Testing has shown that 1 degree of negative camber is best for most track conditions Increasing negative camber in the range of 1 2 degrees will generally increase steering Decreasing negative camber in the range of 0 1 degree will generally decrease steering and the Speed NT will feel easier to drive as a result This is most often a very critical adjustment in tuning your Speed NT that ca
27. nce Just as in a real car alignment is an important factor in your vehicle s handling When you are ready to make adjustments it is a good idea to have a flat work space to place your vehicle on This will enable you to easily and more quickly make both Toe in and Chamber adjustments These adjustments should be set with the vehicle sitting at its normal ride height Starting Settings Carburetor High Speed 2 Turns Out Low Speed 23 4 Turns Out Slipper 4 Turns Out Radio End Points 15 MaS E Tuning the Front End of the Speed NT Shock Location The Speed NT has two mounting locations on the front shock tower The position can be easily adjusted by simply moving the top of the shock to another hole The standard location outside hole on the tower works best on most surfaces Moving the top of the shock inward a hole will slow steering response and make the Speed NT smoother in bumps The standard position on the arm is outside which offers the best balance Running the inside shock location will give the Speed NT more steering into the turn and less steering on corner exit Running the shock location outside on the front arm will give you less overall steering into the turn and keep the front end flatter through the turn making the Speed NT smoother and easier to drive This can be used on high traction surfaces Keep in mind as you move the shocks in on the arm this will require internal limiters to obtai
28. orizon Hobby Inc Horizon warranties that the Products purchased the Product will be free from defects in materials and workmanship at the date of purchase by the Purchaser Limited Warranty a This warranty is limited to the original Purchaser Purchaser and is not transferable REPAIROR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER This warranty covers only those Products purchased from an authorized Horizon dealer Third party transactions are not covered by this warranty Proof of purchase is required for warranty claims Further Horizon reserves the right to change or modify this warranty without notice and disclaims all other warranties express or implied b Limitations HORIZON MAKES NO WARRANTY OR REPRESENTATION EXPRESS OR IMPLIED ABOUT NON INFRINGEMENT MERCHANTABILITY OR FITNESS FORA PARTICULAR PURPOSE OF THE PRODUCT THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER S INTENDED USE c Purchaser Remedy Horizon s sole obligation hereunder shall be that Horizon will at its option i repair or ii replace any Product determined by Horizon to be defective In the event of a defect these are the Purchaser s exclusive remedies Horizon reserves the right to inspect any and all equipment involved in a warranty claim Repair or replacement decisions are at the sole discretion of Ho
29. ormation for the European Union Declaration of Conformity in accordance with ISO IEC 17050 1 Instructions for Disposal of WEEE by Users in the European Union This product must not be disposed of with other waste No HH20090722 Instead it is the user s responsibility to dispose of their waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment The separate collection and recycling of your waste equipment Product s SPEED NT RTR at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human Item Number s LOSBO125 health and the environment For more information about where Equipment class 2 you can drop off your waste equipment for recycling please contact your local city office your household waste disposal service or where you purchased the product The object of declaration described above is in conformity with the requirements of the specifications listed below following K the provisions of the European R amp TTE directive 1999 5 EC C lt O EN 300 328 Technical requirements for Radio equipment E EN 301 489 1 301 489 17 General EMC requirements Signed for and on behalf of FI EE LV LT PL FL Horizon Hobby Inc July 22 2009 capo es fore ce HT Aa NLK Vice President International Operations and Risk Management Horizon Hobby Inc ee Operating and Tuning
30. ps smoking or loses speed This can be caused by the terrain atmospheric conditions or drastic altitude changes To avoid permanent engine damage immediately richen the mixture by turning the high speed needle counterclockwise at least two hours and be prepared for further adjustments before running any more Note The normal operating temperature as seen on your radio screen should be in the 190 to 220 F 88 to 105 C range 10 MaS E About Glow Plugs The glow plug is like the ignition system in your automobile The coiled element in the center of the plug glows red hot when connected to a 1 5 volt battery located in the igniter This is what ignites the fuel air mixture when compressed in the cylinder After the engine fires the heat generated by the burning fuel keeps the element hot Common reasons for the engine not starting are the 1 5 volt battery being weak the glow plug being wet with fuel or the element burned out Use a spare glow plug to check the igniter If the igniter makes the element glow remove the plug from the engine to check it in the same manner A wet glow plug means there is excess fuel in the engine To eliminate this put a rag over the head and turn the engine over a few seconds with your Spin Start Reinstall the glow plug making sure you have the brass gasket on it The engine should now start Testing the Temperature The ideal operating temperature for an engine will vary with the
31. r blinking Orange LED will stop blinking and become solid indicating they have bound themselves together Turn off both the vehicle and the transmitter then remove the Bind plug from the receiver Failing to remove the Bind plug will cause the receiver to attempt to re bind every time you turn on the vehicle and transmitter Turn on both the vehicle and transmitter to ensure operation If the transmitter does not control the vehicle please repeat steps 1 6 Should this not correct the problem please call Horizon Service Repair for further assistance The Bind process is complete Your vehicle s radio system should be ready for use I ae Using the EPA Adjustment The Endpoint Adjustment EPA feature of the Losi DSM radio allows you to set the amount the servo travels when you turn the steering wheel or push pull the throttle This is especially helpful to prevent the servos from stalling with normal operation Steering Throttle Brake First set the steering trim so the truck goes straight without touching the steering wheel Lift the front of the truck off of the ground and turn the steering wheel to the right Use the included mini screwdriver to adjust the pot marked right back and forth stopping when the wheels can turn to the right no more Repeat this procedure turning left using the pot marked left First set your Throttle Brake trim With the engine not running remove the air cleaner P
32. re automatically selected when the transmitter and vehicle are turned on The communication between the transmitter and receiver begins in the few seconds after the transmitter and vehicle are both turned on This is called the binding process The Losi DSM radio system will not interfere with previous technology radio systems that operate on 27MHz or 75MHz frequencies and you will not receive any interference from them Although set at the factory below are the steps required to re bind your transmitter to the receiver should the need arise During the binding process there is a unique ID from the transmitter communicated to the receiver to ensure trouble free radio operation Binding the Radio System Steps to Re Bind ie Ensure that the transmitter and vehicle are both turned off Using the supplied Bind plug which looks like a standard receiver plug with a wire loop installed insert the Bind plug into the receiver slot labeled BIND Looking down on the receiver this slot would be below the LED and is the farthest from the LED or nearest to the corner of the receiver Note You do not need to remove any of the other plugs to re bind With the Bind plug installed turn on the vehicle Notice a blinking Orange LED within the receiver Now you are ready to turn on the transmitter You should notice on the back of the transmitter a similar blinking Orange LED under the translucent cover Both the receiver and transmitte
33. result in damage to the engine or clutch Leave plenty of room to stop the model It will take as much room to stop as it did to accelerate Avoid repeated or prolonged heavy braking as this will cause the brakes to overheat and fail Steering Servo Location i ki Front Mounted Servo 7 Pa AM The steering servo in the Speed NT comes mounted in the forward position to help keep the front end on the ground while accelerating and at top speed It can also be moved to a rearward position which will allow the Speed NT to pull wheelies even easier There are locating pins on the servo mounts that key to pockets on the center brace at the top and bushings that sit in holes on the chassis As seen in the photos if you choose to move the steering servo to the rear position you must move the servo mount bushings to the rear position in the chassis and also remove and reinstall the studded ball in the servo arm to the front side Changing Gear Ratio A 22 tooth clutch bell is mounted on the engine of your Speed NT If you feel the need for greater speed an optional 23 tooth clutch bell LOSA9391 can be fitted by following these steps 1 Remove 4 40 screw attaching the pipe mount to the center brace Photo SNT setting gear mesh 1 Remove the throttle link from the carburetor Remove the four 5 40 screws from the underside of the chassis that secure the engine Remove the screw from the end of the
34. rizon This warranty does not cover cosmetic damage or damage due to acts of God accident misuse abuse negligence commercial use or modification of or to any part of the Product This warranty does not cover damage due to improper installation operation maintenance or attempted repair by anyone other than Horizon Return of any goods by Purchaser must be approved in writing by Horizon before shipment 20 F a Damage Limits HORIZON SHALL NOT BE LIABLE FOR SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT WHETHER SUCH CLAIM IS BASED IN CONTRACT WARRANTY NEGLIGENCE OR STRICT LIABILITY Further in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted As Horizon has no control over use setup final assembly modification or misuse no liability shall be assumed nor accepted for any resulting damage or injury By the act of use setup or assembly the user accepts all resulting liability If you as the Purchaser or user are not prepared to accept the liability associated with the use of this Product you are advised to return this Product immediately in new and unused condition to the place of purchase Law These Terms are governed by Illinois law without regard to conflict of law principles Safety Precautions This is a sophisticated hobby Product and not a toy It must
35. ull full back on the throttle trigger and note the position of the carburetor barrel Adjust the pot marked throttle back and forth so that the barrel just reaches wide open going further will only hurt performance Release the trigger and push it forward Turn the pot marked brake counterclockwise away from the as far as it will go Now turn it clockwise toward the until it stops moving This will give you maximum push brake Engine Break In and Adjustments The new Losi 3 4 engine in your Speed NT has been machined to tight tolerances and does not need an extended break in It is always a good idea to take it easy for the first few tanks of fuel to let all the gears and moving parts seat into one another You will notice after the first hour of operation that the engine will pick up power It is highly advised that you use Nitrotane 20 Sport fuel as the carburetor is factory set for this fuel and other fuels may require immediate needle valve adjustments NEVER use model airplane fuel as it may cause damage to the engine and void any warranty If you change fuels or run in dramatically different environments hot cold high low elevation etc you will probably have to adjust at least the high speed needle to prevent overheating and maintain proper performance Understanding Rich and Lean Fuel Mixture Adjusting the carburetor is one of the most critical facets of running a nitro po
36. upervision is necessary while charging batteries e Always check to ensure the polarity of battery connection is correct Never leave batteries unattended while charging Never charge a battery while it is installed in the Speed NT Do not charge any battery that appears to have any damage If there are exposed wires do not charge or use the battery until you have installed shrink wrap or replaced the complete wire If charging NiMH batteries select a charger to meet your requirements Chargers can be of two primary types for their source of power a 100 240V wall charger or one which requires a 12V power supply Follow the charger manufacturer s instructions and precautions during each use F Supplied and Required Equipment Supplied tools Required Equipment You will need the following items to start and run the Speed NT 20 Sport Fuel Preferably Nitrotane 20 Sport LOSF0020 Fuel Bottle LOSB5201 or similar Glow Igniter Losi aluminum rechargeable unit with charger LOSB5221 or similar 7 2V rechargeable battery for the Spin Start LOSB9900 or similar Charger for 7 2V battery and receiver pack optional LOSB9606 or similar Coming Soon LOSA99072 Deluxe Nitro Starter Kit with everything except fuel at a great package price 2 Way wrench Radio Adjusting Screwdriver Transmitter Receiver BIND Plug Four 4 Hex Wrench L shaped 050 inch 1 16 inch 5 64 inch and 3 32 inch F
37. wered RC vehicle The fuel mixture is referred to as being rich when there is too much fuel and lean when there is not enough fuel for the amount of air entering the engine The amount of fuel entering the engine is adjusted with high and low speed threaded needle valves The low speed needle is located in the front of the moving slide The high speed needle sticks straight up at the back of the carburetor Both feature a slotted head that is used as a reference and receptacle for a flat blade screwdriver for adjustments The mixture is made richer by turning the needle counterclockwise and leaner by turning clockwise An overly rich mixture will yield sluggish acceleration and performance with thick smoke from the exhaust A lean mixture can cause the engine to hesitate before accelerating or in some cases to lose power momentarily after the initial acceleration A lean mixture also makes the engine run hotter than desired and does not provide enough lubrication for the internal engine components causing premature wear and damage It is always advisable to run the engine slightly rich and never lean to avoid overheating and possible damage Base Start up Settings from the Factory High Speed Needle 2 turns out from bottom Low Speed Needle 2 turns out from bottom Engine Tuning After the engine is broken in you can tune it for optimum performance When tuning it is critical that you be cautious of over
38. y should you make contact while running the Speed NT Safety Precautions THIS PRODUCT IS NOT A TOY The Speed NT is a sophisticated high performance radio control model which needs to be operated with caution and common sense Failure to operate this model in a safe and responsible manner could result in personal and or property damage It is your responsibility to see that the instructions and warnings are followed and precautions adhered to The Speed NT is not intended for use by children without direct adult supervision Losi and Horizon Hobby shall not be liable for any loss or damages whether direct indirect special incidental or consequential arising from the use misuse or abuse of this product or any product required to operate it This is still only a model do not expect it to do unrealistic stunts Warnings The Speed NT is powered by a special fuel containing flammable liquids and special care must be taken as noted below e Model fuel is dangerous if handled carelessly Follow all directions and precautions on the fuel container NEVER drink fuel call a doctor immediately if ingested or splashed into your eyes Keep fuel and all chemicals out of the reach of children e Always keep the fuel container closed and never use around an open flame or while smoking e The exhaust emits poisonous carbon monoxide fumes Always run your model in a well ventilated area and never attempt to run it indoors e T
39. zon is not responsible for merchandise until it arrives and is accepted at our facility A Service Repair Request is available at www horizonhobby com on the Support tab If you do not have internet access please include a letter with your complete name street address email address and phone number where you can be reached during business days your RMA number a list of the included items method of payment for any non warranty expenses and a brief summary of the problem Your original sales receipt must also be included for warranty consideration Be sure your name address and RMA number are clearly written on the outside of the shipping carton Warranty Inspection and Repairs To receive warranty service you must include your original sales receipt verifying the proof of purchase date Provided warranty conditions have been met your Product will be repaired or replaced free of charge Repair or replacement decisions are at the sole discretion of Horizon Hobby F a Non Warranty Repairs Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50 of the retail purchase cost By submitting the item for repair you are agreeing to payment of the repair without notification Repair estimates are available upon request You must include this request with your repair Non warranty repair estimates will be

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