Yamaha YZ250X 2023 Owner's Manual

TROUBLESHOOTING7-7EAM30511TROUBLESHOOTING OF TRANSMISSIONClutch noiseDamaged or worn primary drivengearReplace the primary drive gear orcrankshaft, and the clutch housingas a set.Loose clutch boss nut Tighten the clutch boss nut to thespecified torque.Fatigued clutch damper Replace the clutch housing.Worn clutch housing bearing Replace the clutch housing bear-ing.Worn pressure plate bearing Replace the pressure plate bear-ing.Symptom Possible cause ActionsDifficult or impossible to shifttransmission gearClutch drags Refer to “Clutch drags”.Improperly adjusted shift rod Adjust the shift rod installationlength.Bent shift shaft Replace the shift shaft.Foreign object in a shift drumgrooveRemove foreign object from shiftdrum groove.Damaged shift drum Replace the shift drum.Seized shift fork Replace the shift fork and shift forkguide bar as a set.Bent shift fork guide bar Replace the shift fork guide bar.Foreign object between transmis-sion gears Remove foreign object from trans-mission gears.Seized transmission gear Replace the seized gear and theaxle as a set.Improperly assembled transmis-sionReassemble the transmission axleassembly.Jumps out of gearIncorrect shift pedal position Adjust the shift pedal position.Improperly returned stopper lever Replace the stopper lever spring.Bent or worn shift fork Replace the shift fork.Shift drum incorrect axial play Replace the shift drum.Worn shift drum groove Replace the shift drum.Worn transmission gear dog Replace the transmission gear.Transmission noiseDamaged or worn transmissiongear Replace the transmission gear.Worn main axle spline Replace the main axle.Worn drive axle spline Replace the drive axle.Worn bearing Replace the bearing.Symptom Possible cause Actions