- S&S Cycle
Contents
1. NE of R i Owners Manual S amp S V Series Engines Was 2 DISCLAIMER S amp S parts are designed for high performance closed course racing applications and are intended for the very experienced rider only The installation of S amp S parts may void or adversely effect your factory warranty In addition such installation and use may violate certain federal state and local laws rules and ordinances as well as other laws when used on motor vehicles used on public highways especially in states where pollution laws may apply Always check federal state and local laws before modifying your motorcycle It is the sole and exclusive responsibility of the user to determine the suitability of the product for his or her use and the user shall assume all legal personal injury risk and liability and all other obligations duties and risks associated therewith The words Harley Harley Davidson H D Sportster Evolution and all H D part numbers and model designations are used in reference only S amp S Cycle is not associated with Harley Davidson Inc SAFE INSTALLATION AND OPERATION RULES Before installing your new S amp S part it is your responsibility to read and follow the installation and maintenance procedures in these instructions and follow the basic rules below for your personal safety Gasoline is extremely flammable and explosive under certain conditions and toxic when breathed Do2. and twist the throttle twice to prime the carburetor starting in extremely cold weather may require additional priming Pull the fast idle lever up turn on the ignition and press the start button or kick the engine through If the engine does not start after several kicks or five seconds of cranking shut the ignition off for 15 seconds to let the starter cool Open the throttle slightly and press the starter button or kick the engine through again It may be necessary to re prime the engine If the engine kicks back the throttle may be opened too far Once the engine is running use the fast idle lever to maintain the proper engine speed required during warm up When the engine has warmed up enough to idle without the enrichment system disengage the fast idle lever The fast idle lever is not required to restart a hot engine INITIAL START UP WITH IST IGNITION 1 2 Start the motorcycle up as outlined above The IST ignition comes with a general ignition map that will allow the engine to be started and run Within 3 to 5 hours of operation the IST module will optimize this map for your engine based on data from the knock sensor and other sensors Ride the motorcycle as you would normally being sure to include hills highway speeds for at least 20 minutes at a time and around town Be sure to use the throttle in as many settings as possible without going past the suggested break in procedures Once the engine is completel
3. 15 OWNERS MANUAL S amp S V SERIES ENGINES SPECIFICATIONS amp WEAR LIMITS TORQUE SPECIFICATIONS Description Specification Description Specification Wear Limit HOES EBON a 100720 nbs Epes io Shaft in bushing 0007 0018 0035 Side play 006 036 Rocker Box base 46 15 18 ft lbs Loctite 243 Exhaust flange to head 15 18 ft lbs Bushing fitin rocker arm press 0012 0032 lt o012 Wristpin in rod Rocker arm support plate 15 18 ft lbs Loctite 243 Head temp sensor 10 12 ft lbs i ET Cylinder head bolts Bfelbs 18ft Oil threads 11 ft lbs Anti seize TAE SS a7 Cylinder studs 10 ft lbs Loctite 272 ae aan ae Valve to guide fit intake 0012 002 0035 9 Sparkplug nti seize i r Timken endpla 001 005 Giankease fasteners 12 15 ft lbs 14 Valve to guide fit exhaust 0017 0025 0040 Play NOTE 12 in lbs equals 1 ft lbs Valve guide in head press 0015 0030 lt 0015 Pinion bearing fit 0004 001 18 20 ft lbs 5 6 Valve seat in head press 0050 0070 lt 0050 Cam Chest SSS Pa Seat width intake 041 Breather gear endplay 005 015 Seat width exhaust 057 Breather clearance 0015 003 Valve stem protrusion 2 045 2 060 2 080 Camshaft in bushing 0007 002 0035 Piston oilers 25 in lbs Loctite 243 Pinion nut 50 ft lbs Loctite 272 Tappet guide fasteners 90 120 in lbs Loctite 243 Pushrod locknuts 90 120 in lbs Gear cover fasteners 100 120 in lbs Lo
4. TUNING GUIde ssecsssescssseseecseecsssecesseeeesees 9 Engine Service INtervalls ssssccssssccssseccsseecsssseccssseecssseessnseccsseeseseteesseeees 12 Engine Specifications Engine 14 Torque 16 Specifications and Wear Limits OWNERS MANUAL S amp S V SERIES ENGINES INTRODUCTION The S amp S engine you have purchased is an air cooled v twin It is designed to offer Proven Performance and reliability Specifications for the 32 35 4 and 4 bore engines are found in this manual We have covered the most popular configurations 80ci 96ci 111ci and 124ci based on their original S amp S production designs Some changes may have been made over time as these engines have been in production for a number of years The specifications in this manual are based on the most recent production specifications ENGINE INSTALLATION The procedure for installing an S amp S engine is basically the same as outlined in the factory service manual for the model of motorcycle the engine is being installed in However S amp S engines are sometimes taller then a stock engine so the installer must check to make sure there is adequate clearance between the engine and all chassis components including the frame and fuel tanks An upgraded clutch should also be considered s
5. a well ventilated area where fumes can dissipate WARRANTY All S amp S parts are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of twelve 12 months from the date of purchase Merchandise that fails to conform to these conditions will be repaired or replaced at 5 amp 5 5 option if the parts are returned to us by the purchaser within the 12 month warranty period or within 10 days thereafter In the event warranty service is required the original purchaser must call or write S amp S immediately with the problem Some problems can be rectified by a telephone call and need no further course of action A part that is suspect of being defective must not be replaced by a Dealer without prior authorization from S amp S If it is deemed necessary for S amp S to make an evaluation to determine whether the part was defective a return authorization number must be obtained from S amp S The parts must be packaged properly so as to not cause further damage and be returned prepaid to S amp S with a copy of the original invoice of purchase and a detailed letter outlining the nature of the problem how the part was used and the circumstances at the time of failure If after an evaluation has been made by S amp S and the part was found to be defective repair replacement or refund will be granted ADDITIONAL WARRANTY PROVISIONS 1 S amp S shall have no obligation in the event an S amp S pa
6. load must be placed on the engine to properly seat the rings Running a new engine continually with no load will result in cylinder glazing and poor ring seal The engine should be loaded to simulate close to the weight of the bike a load of 10 15 on a Dyno jet 250i is usually sufficient It is not recommended to use an inertia only dyno to break in an engine as no load can be placed on the engine Initial tuning on the engine can be completed during the initial 50 miles of dyno break in It is recommended the engine be run on the street for a minimum of 500 miles prior to completing tuning at full power Monitor engine temperature during tuning to ensure the engine is not overheated DYNO BREAK IN PROCEDURE FIRST 50 MILES 1 Follow the same procedure outlined above for initial start up and heat cycling the engine 2 Run the bike for 25 miles on the dyno under varying speeds and loads while going up and down through the gears Keep engine RPM below 3 500 RPM but do not lug the engine The dyno must be operated so the engine runs under a load roughly equal to the power needed to move the bike down the road this would be about 12 hp at 55 MPH Keep engine head temperatures below 200 F at the temp sensor or surface of the head Stop and cool the engine if needed 3 Allow the engine to cool down to room temperature 4 the bike for 25 more miles 50 miles total under varying speeds loads and gears as before Make sure there i
7. not smoke Perform installation in a well ventilated area away from open flames or sparks If motorcycle has been running wait until engine and exhaust pipes have cooled down to avoid getting burned before performing any installation steps Before performing any installation steps disconnect battery to eliminate potential sparks and inadvertent engagement of starter while working on electrical components Read instructions thoroughly and carefully so all procedures are completely understood before performing any installation steps Contact S amp S with any questions you may have if any steps are unclear or any abnormalities occur during installation or operation of motorcycle with a S amp S part on it Consult an appropriate service manual for your motorcycle for correct disassembly and reassembly procedures for any parts that need to be removed to facilitate installation Use good judgment when performing installation and operating motorcycle Good judgment begins with a clear head Don t let alcohol drugs or fatigue impair your judgment Start installation when you are fresh Be sure all federal state and local laws are obeyed with the installation For optimum performance and safety and to minimize potential damage to carb or other components use all mounting hardware that is provided and follow all installation instructions Motorcycle exhaust fumes are toxic and poisonous and must not be breathed Run motorcycle in
8. A FILTER TO TANK La many countries outside the United States the RON Research Octane VENT TO TANK C TANK TO PUMP IN surety Number is used which will result in higher octane requirement of which the engine can be changed over to synthetic oil E FILTER IN TK about 96 G FRONT HEAD TO WANFOLD e BREAK IN PROCEDURE I POV OUT ONE Al 4 GENERAL BREAK IN NOTES 1 Initial start up Run engine approximately one minute at 1250 CARB MF ASSY OIL PRESSURE ita OOS TO AR CLEANER PONT Remember that these are air cooled engines Sufficient air movement 1 30 REM DO NOT crack throttle or subject toany loads during M OIL PUMP IN gt this period as head gaskets are susceptible to failure at this time SETION CHE ROUTING is required to keep engine temperatures within safe operating limits oe aa RELOCATE FITTING During this time check to see that oil pressure is normal that oil is Avoid heavy traffic and congestion or extended idle periods whenever returning the oil tank and that no leaks exist 2 Shut off engine and thoroughly check for any leaks or other problems Let engine cool to the touch 3 After engine has cooled start up again and allow the motor to build some heat Engine should be run no longer than three to four minutes When the cylinders become warm hot to the touch approximately 150 F shut the motor down and let it cool to room temp Follow the same
9. ER OPTIONAL LINE ROUTING SUPPLY FROM OIL TANK OPTIONAL LINE ROUTING RELOCATE FITTING RETURN TO OIL FILTER RELOCATE FITTING OPTIONAL CASE BREATHING OILLINE HOOK UP FOR V SERIES WITH VACUUM BREATHING FUEL REQUIREMENTS The gasoline used in your engine should have a US octane rating of 91 or higher The United States uses the method of octane rating OWNERS MANUAL S amp S V SERIES ENGINES BREAK IN OIL CONSIDERATIONS Either petroleum or synthetic oil designed for air cooled v twin engines can be used during the break in period and during normal use If preferred petroleum oil can be used for the break in period after ss P OA E tC c B OIL PUMP possible S amp Sv twin performance engines are designed for and happiest when running between 2750 3500 at normal highway speeds e Today s heavier bikes and taller gearing can easily push a high performance engine into a lugging condition which increases loads on engine components causes detonation builds excessive heat and increases fuel consumption If the engine does not accelerate easily when given some throttle downshift to a lower gear S amp S engines benefit from a warm up period any time they are started allow engine to reach operating temperature before being subjected to heavy loads or quick throttle revs
10. cautions as for the initial start up and continue to check for problems 4 First 50 Miles a Street Ride normally do not lug the engine Avoid high heat conditions and vary the RPM while riding No stop and go traffic extended idle periods or high load or high RPM conditions Max of 3 500 RPM or 60 MPH b Dyno A chassis dynamometer can be used to put the first 50 miles on a new engine See the notes and procedure below for chassis dyno break in 5 OWNERS MANUAL S amp S V SERIES ENGINES 5 50 100 Miles Ride normally do not lug the engine Avoid high heat conditions no stop and go traffic or extended idle periods Limited short bursts of throttle can aid in ring seating from this point forward during the break in but avoid continuous high speed or load conditions Max of 4 250 RPM 70 MPH 6 100 500 Miles Avoid lugging the engine and high heat conditions Max of 5 000 RPM Change oil at 500 miles 7 500 1 000 miles Ride bike normally but avoid continuous high load operation and high heat conditions 8 From 1 000 miles on Break in is complete enjoy NOTES FOR COMPLETING INITIAL 50 MILE BREAK IN AND INITIAL TUNING ON A CHASSIS DYNO When running the bike on the dyno it is critical that engine temperatures are monitored AFR is kept between 12 5 14 7 and the engine is not overheated Fans must be used to keep the engine cool When tuning under higher loads stop regularly and allow the engine to cool A
11. ctite 243 Fit in cylinder 002 0026 0055 Pinion shaft in bushing 001 0025 0035 Timing hole plug Compression ring 017 026 Bushing fit in gear cover press 0007 0023 lt 0006 Oil pump cover mounting bolts 4 90 120 in lbs PF Oil ring gap 010 040 Oil pump shaft 0005 0025 0035 Oil pump top mounting 2 60 in lbs ites CCC Intake manifold to head 16 ft lbs Loctite 243 Lifter fit in guide 0006 0017 0022 Loctite 243 Intake manifold to carb 18 ft lbs 16 17 OWNERS MANUAL NOTES SES Cycle Tuc 14025 County Hwy G Viola WI 54664 Phone 608 627 1497 Fax 608 627 1488 Technical Service Phone 608 627 TECH 8324 Technical Service Email sstech sscycle com www sscycle com 510 0365 04 02 15 Copyright 2015 by S amp S Cycle Inc All rights reserved Printed in the U S A
12. e that is fitted with an exhaust system that is not intended for high performance The air bleed uses main jets the stock size is 40 If it needs to be changed the range is normally 50 to 60 NOTE Drag or straight pipes especially large diameter or long designs can prevent you from obtaining optimum carburetor performance Ifthe S amp S teardrop air cleaner is being replaced with an aftermarket air cleaner be sure to remove the auxiliary bowl vent screw 14 Never use a velocity stack on a street driven motorcycle Poor throttle response will be experienced Always be sure to attach the hose to the overflow tube fitting 6 and route it toward the back of the engine OWNERS MANUAL S amp S V SERIES ENGINES Approximate Jetting For S amp S Super E amp G Carburetors Displacement 74 88ci 96 107ci 111 124ci Intermediate Jet 265 028 0295 mane jl o o ore These jetting recommendations are a starting point only Re jet carb for best performance O IN a 1 Idle Speed Screw SS NS 2 Idle Mixture Screw 3 Accelerator Pump Adjustment Screw 4 Enrichment Device 5 Serial Number 6 Overflow Tube Fitting 7 Fuel Inlet 8 Bowl Vent Hole 9 Bowl Plug 10 Accelerator Pump Pushrod 11 Intermediate Jet 12 Main Jet 13 Main Jet Air Bleed 14 Auxiliary Bowl Vent Plug OWNERS MANUAL S amp S V SERIES ENGINES ENGINE SERVICE INTERVALS ENGINE SPECIFICATIONS interval The fo
13. f you do not use this spacer the rotor could bottom out against the case when the sprocket shaft nut is tightened IMPORTANT INFORMATION e S amp S engines are not recommended for inexperienced riders because the increased performance requires a higher level of riding skill Do not lug your S amp S engine This is a high performance engine designed to produce excellent horsepower at higher RPM It was not well suited to pull heavy loads at low RPM We recommend that the engine not be operated below 2500 RPM for extended periods of time Shift to a lower gear to keep the engine speed up when traveling at lower speeds Your S amp S Engine is air cooled which means that it depends on air moving across the cooling fins to keep it from over heating Do not allow your engine to idle for extended periods of time Avoid stop and go traffic or any other situation where the motorcycle is not moving while the engine is running e To avoid engine damage do not operate the engine above 6200 RPM SERVICE SPECIFICATIONS FOR S amp S ENGINES For the most part if an S amp S engine requires service a qualified mechanic who services Harley Davidson engines can do the work However the specifications for S amp S engines are somewhat different These charts are provided for reference For more detailed information about any specific S amp S component installation instructions are available for free download from the S amp S website www sscycle com
14. gnition timing and protect your engine from damage Removing the IST ignition may void your warranty Ignition timing in S amp S fuel injected engines is controlled by the S amp S VFI module The calibration file supplied by S amp S for the particular engine contains ignition timing curves If the ignition curve is modified or if another fuel injection module is used the engine warranty may be voided If you choose to install another ignition system make sure that the total ignition advance is set according to the specifications in this chart If the ignition system has a rev limiter make sure it is set no higher than 6200 rpm RPM Max Advance Total Advance Max Advance VOES Grounded Wide Open If you choose to install another EFI module on a fuel injected V124 engine the following ignition table should be used as a guide for ignition advance under various conditions EFI Ignition Table S amp S V124 10 8 1 CR 640 Cam Ces Ce a E A R eie feefee par par piper Idle Decel 15 5 20 4 34 4 40 40 0 OWNERS MANUAL S amp S V SERIES ENGINES START UP ENGINES EQUIPPED WITH S amp S SUPER E OR G CARBURETOR 1 S amp S Super E amp G carburetors have a mixture enrichment fast idle lever used to aide in cold starts and help during the warm up period Do not ride the motorcycle with the lever engaged Turn the fuel supply valve on wait a moment to make sure the carburetor bowl is full
15. ince the S amp S engine will produce more power than the stock engine it is replacing OIL LINE HOOK UP The following diagrams show how the crankcase breather and oil lines should be hooked up for S amp S V Series engines Note most 48 bore engines have a use a vacuum breather system Ambient Temperature F SAE 20W50 Above 30 100 SAE 50 Above 60 100 SAE 25W60 Above 80 SAE 60 Above 80 OIL RECOMMENDATIONS S amp S recommends synthetic engine oil such as S amp S Premium Synthetic 20W50 However a premium petroleum based engine oil such as S amp S Heavy Duty 20W50 or 25W60 is acceptable Regardless of what type of oil you select be sure to use only oil specifically designated for use in an air cooled motorcycle and select the viscosity suggested for the temperature range you will be operating your motorcycle in The oil filter used on an 5 amp 5 V Series engine should be rated at 24 microns Spin on filters should not have an anti drain back valve S amp S filters are available to replace Harley Davidson 63805 80A and 63796 77A The S amp S part numbers are 31 4101 and 31 4102 OIL LINE HOOK UP V SERIES A FILTER TO TANK B VENT TO TANK C TANK TO PUMP IN D PUMP OUT TO FILTER IN G H l J BREATHERS TO BACKPLATE CARB MF ASSY CAM CHEST OIL PUMP IN RETURN TO OIL FILTER SUPPLY FROM OIL TANK j OPTIONAL CASE BREATHING VENT 1 PRESSURE TO AIR CLEAN
16. llowing chart contains information about a number of S amp S engines covered by this owners manual Air Cleaner Element Inspect at 50 and 500 miles 80 and 800 kilometers every 2 500 miles 4 000 kilometers thereafter System Tappet Oil Screen Inspect every 2 500 miles 4 000 kilometers Replace every 5 000 miles 8 000 kilometers None or None Petcock Lines amp Fittings Inspect at 50 and 500 miles 80 and 800 kilometers every 2 500 miles 4 000 kilometers thereafter ee ee ee ee Pe eee ee ee Vacuum Lines r vaerv f ist Fuel Tank Filter Screen amp Inspect every 5 000 miles 8 000 kilometers v96 T V 0 IST In Line Fuel Filter If used 111 111 4y Aye 9 8 1 585 Hydraulic w HL2T Super E Super Stock Engine Idle Speed Adjust as required or IST Operation of Throttle amp Inspect at 500 miles 800 kilometers and every 2 500 miles 4 000 kilometers thereafter V113 T V 4 4a 10 1 1 Hydraulic w HL2T 547 Enrichment Device Controls V124 124 AYA 456 10 8 640 Hydraulic w HL2T Super G or VFI Super Stock Spark Plugs Inspect every 5 000 miles 8 000 kilometers Replace every 10 000 miles 16 000 kilometers or as needed IST or VFI Engine Mounts Inspect at 500 miles 800 kilometers and every 5 000 miles 8 000 kilometers thereafter External Fasteners Except Re torque at 500 miles 800 kilometers and every 5 000 miles 8 000 kilometers thereafter Engine Head Bolts 1 S amp S recom
17. mends that petroleum based oil not specifically formulated for motorcycles should be changed every 1 000 miles 1 600 kilometers after the break in period 2 Replace more frequently if required or if engine is operated in a dusty environment 12 13 OWNERS MANUAL S amp S V SERIES ENGINES ENGINE DIMENSIONS Some S amp S engines are taller than stock engines These diagrams show the dimensions of various S amp S engines This information will be most 14 useful to customers building custom motorcycles with after market frames A SECTION V100 15 623 20 062 V107 15 728 20 163 V113 15 846 20 266 V113 TUV 15 846 20 266 V124 15 979 20 366 V124 TUV 16 048 20 424 n E 13 SS SSN ront of Engine gt SERVICES SPEED CENTER Nothing lasts forever and despite the superior materials and design of the components in your S amp S engine some day it will need to be serviced Who better to repair your engine than the technicians at the company where it was made To obtain factory service for your S amp S engine have your S amp S dealer contact the S amp S Service amp Speed Center To find an S amp S dealer in your area go to the S amp S Dealer Locator at www sscycle com dealer locator CHARGING SYSTEM NOTE If you are going to use a 45 amp alternator you must install a S amp S spacer PN 31 4033 I
18. rt is modified by any other person or organization 2 S amp S shall have no obligation if an S amp S part becomes defective in whole or in part as a result of improper installation improper maintenance improper use abnormal operation or any other misuse or mistreatment of the S amp S part 3 S amp S shall not be liable for any consequential or incidental damages resulting from the failure of an S amp S part the breach of any warranties the failure to deliver delay in delivery delivery in non conforming condition or for any other breach of contract or duty between S amp S and a customer 4 S amp S parts are designed exclusively for use in Harley Davidson and other American v twin motorcycles S amp S shall have no warranty or liability obligation if an S amp S part is used in any other application OWNERS MANUAL S amp S V SERIES ENGINES Table of Contents Introductio OEE 2 Engine Installation nssssssissecssscaisessssossesssscusesscnsesiedvessssassssvessesesisssssnsserars 2 Oil Line Hook up RECOMMENALIONS cesssesssesseessesssesssessessessecssesssesseessessscsscssseessesssesees 2 General Break In Procedure c ssssssecssessssssesseessecssesssesseessessessseesseessesseesses 5 Tune Up Information Super Stock amp IST Ignition Systems sssssccssssccssecssseescessecssseeeeseeeesees 7 CIO IN 7 Starting Procedure Super E amp G Carburetor
19. s some load on the engine Keep engine speed below 4 250 RPM but do not lug the engine Limited short bursts of throttle can aid in ring seating as long as the calibration tune keeps the AFR in control Keep engine head temperatures below 225 F at the temp sensor or surface of the head 5 After the first 50 miles on the dyno it is recommended the normal break in schedule be followed under normal riding conditions on the street See Step 5 under BREAK IN PROCEDURE TUNE UP INFORMATION S amp S 4 bore and smaller V Series engines come from the factory with Champion RN12YC 14mm long reach spark plugs S amp S PN 55 1321 4 1 bore engines come from the factory with Champion RA8HC 12mm spark plugs S amp S PN 55 1320 All spark plugs should be gapped between 038 and 042 inch If you are not using an S amp S ignition system refer to your ignition manufacturer for any additional recommendations IGNITION SYSTEM Carbureted S amp S V Series engines come from the factory with either an S amp S Super Stock or IST ignition system installed Fuel injected engines are equipped with an S amp S VFI module S amp S Super Stock ignition modules are factory programmed for the specific engine they are intended for In addition the module is installed and timed to S amp S specified timing Changing the timing or removing the Super Stock ignition may void your warranty S amp S IST ignition systems employ a knock sensor to automatically optimize i
20. se until it lightly seats Snap throttle open engine should stumble Turn screw counter clockwise or gt of a turn at a time until engine responds to throttle twist with smooth quick response Ride motorcycle in various RPM ranges and then try to maintain a consistent 40 to 50 MPH If the engine has a flat spot or is popping sneezing in the air cleaner it can indicate a lean condition If you notice stumbling or sputtering it can indicate a rich condition Low RPM operation is controlled by the intermediate jet 11 on following page If sneezing or popping is experienced below approximately 3000 RPMs the intermediate jet must be replaced 10 11 12 with a larger sized richer jet If the engine does not run smoothly at low speeds fouls plugs blows black smoke or gets bad gas mileage a smaller leaner intermediate jet needs to be installed Always readjust the idle mixture 2 and idle speed 1 screws after making a jet change To test the main jet do a roll on from 50 MPH to 70 MPH in 3rd gear If the engine backfires or breaks up in the carb increase the main jet size 004 If the engine is flat or will not accelerate decrease the main jet by 004 Since 2004 S amp S shorty carbs have been fitted with an adjustable main jet air bleed 13 Changing this jet to a larger size will delay the signal to the main jet therefore aiding with high speed tuning as described in step 8 This also aides with tuning an engin
21. y broken in the IST will be tuned to optimize the engine s performance Do not run the engine on a dyno until the IST has had time to tune itself to your engine START UP ENGINES EQUIPPED THE VARIABLE FUEL INJECTION VFI 1 Turn the ignition and kill switches on Listen for the fuel pump as it pressurizes Do not twist the throttle open to prime the system Press the starter button and let engine crank over do not twist the throttle If the engine is extremely hard to start hot or cold contact the S amp S Tech Line or visit www sscycle com for the location of the closest VFI Tuning Center SUPER E amp G CARBURETOR TUNING GUIDE 1 Verify carburetor is set to stock settings a Idle mixture screw 1 turns from lightly seated b Idle speed screw 2 turn clockwise from engagement point c Accelerator adjustment screw two turns counter clockwise from seated Start bike bring to operating temperature Set idle speed adjusting screw clockwise to increase RPM counter clockwise to decrease RPM Idle RPM range should be 950 to 1050 RPMs Adjust idle mixture by turning idle mixture screw slowly clockwise until the engine runs poorly Note position Slowly turn the screw counter clockwise until it starts to stumble Note position Set the idle mixture screw halfway between the positions or at the strongest idle Inconsistent idle may indicate a manifold leak With engine idling turn accelerator adjustment screw clockwi
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