Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

TROUBLESHOOTING9-2Electrical system1. Battery• Discharged battery• Faulty battery2. Spark plug(s)• Incorrect spark plug gap• Incorrect spark plug heat range• Fouled spark plug• Worn or damaged electrode• Worn or damaged insulator3. Ignition coil(s)• Broken or shorted primary or secondarycoils• Cracked or broken ignition coil4. Ignition system• Faulty ECU• Faulty crankshaft position sensor• Faulty cylinder identification sensorEAS28520POOR MEDIUM-AND-HIGH-SPEED PER-FORMANCERefer to “STARTING FAILURES” on page 9-1.Engine1. Air filter• Clogged air filter element• Faulty YCC-T and YCC-IFuel system1. Fuel pump• Faulty fuel pumpEAS28530FAULTY GEAR SHIFTINGShifting is difficultRefer to “Clutch drags”.EAS28540SHIFT PEDAL DOES NOT MOVEShift shaft• Improperly adjusted shift rod• Bent shift shaftShift drum and shift forks• Foreign object in a shift drum groove• Seized shift fork• Bent shift fork guide barTransmission• Seized transmission gear• Foreign object between transmission gears• Improperly assembled transmissionEAS28550JUMPS OUT OF GEARShift shaft• Incorrect shift pedal position• Improperly returned stopper leverShift forks• Worn shift forkShift drum• Incorrect axial play• Worn shift drum grooveTransmission• Worn gear dogEAS28570FAULTY CLUTCHClutch slips1. Clutch• Improperly assembled clutch• Improperly adjusted clutch cable• Loose or fatigued clutch spring• Worn friction plate• Worn clutch plate2. Engine oil• Incorrect oil level• Incorrect oil viscosity (low)• Deteriorated oilClutch drags1. Clutch• Unevenly tensioned clutch springs• Warped pressure plate• Bent clutch plate• Swollen friction plate• Bent clutch pull rod• Damaged clutch boss• Burnt primary driven gear bushing• Match marks not aligned2. Engine oil• Incorrect oil level• Incorrect oil viscosity (high)• Deteriorated oilEAS28600OVERHEATINGEngine1. Clogged coolant passages• Cylinder head and piston(s)• Heavy carbon buildup