Yamaha YFM35FAS Supplementary Service Manual

Also see for YFM350FAS: Owner's manual Assembly manual

Contents

Yamaha YFM35FAS Supplementary Service Manual Manual pdf 114 page image

– 104 –TRBLSHTGFAULTY GEAR SHIFTING/OVERHEATINGTROUBLESHOOTINGNOTE:The following troubleshooting does not cover all the possible causes of trouble. It should be helpful,however, as a guide to troubleshooting. Refer to the relative procedure in this manual for checking,adjusting and replacing of parts.FAULTY GEAR SHIFTINGHARD SHIFTINGRefer to “CLUTCH SLIPPING” in CHAPTER 10 (Manual No.: 5TE2-AE1).SHIFT LEVER DOES NOT MOVEShift shaft Groove jammed with impurities Bent shift shaftShift fork Seized shift fork Bent shift fork guide barTransmission Seized transmission gear Jammed impurities Incorrectly assembled transmissionShift guide Broken shift guideOVERHEATINGOVERHEATINGIgnition system Improper spark plug gap Improper spark plug heat range Faulty CDI unitFuel system Improper carburetor main jet(improper setting) Improper fuel level Clogged air filter elementCompression system Heavy carbon build-upJUMPS OUT OF GEARShift shaft Improperly adjusted shift lever position Worn shift shaft lever Improperly returned stopper lever Improper thrust play Worn shift shaft grooveShift fork Worn shift forkTransmission Worn gear dogEngine oil Improper oil level Improper oil viscosity Inferior oil qualityBrake Brake dragOil cooling system Faulty thermo unit Faulty CDI unit Faulty fan motor relay Faulty fan motor circuit breaker Clogged or damaged oil cooler Inoperative fan motor