Yamaha YZ125 Owner's Manual

Also see for YZ 125: Parts catalog Owner's service manual Owner's service manual Owner's service manual Owner's service manual

TROUBLESHOOTING7-11EAM30515TROUBLESHOOTING OF STEERING/HANDLINGRear suspension is softOil leaking from rear shockabsorber Replace the rear shock absorber.Gas leaking from rear shockabsorber Replace the rear shock absorber.Fatigued or damaged rear shockabsorber spring Replace the rear shock absorber.Improperly adjusted rear shockabsorber spring preload (soft) Adjust the spring preload.Improperly adjusted rear shockabsorber rebound damping (soft) Adjust the rebound damping.Improperly adjusted rear shockabsorber compression damping(soft)Adjust the compression damping.Oil leaking from rear shockabsorberBent, damaged, or corroded rearshock absorber rod Replace the rear shock absorber.Damaged oil seal lip Replace the rear shock absorber.Symptom Possible cause ActionsHandlebar wobbleLoose steering ring nut Tighten the steering ring nut to thespecified torque.Worn bearing or bearing race Replace the bearing and bearingrace as a set.Warped front fork Repair or replace the front fork.Bent front wheel axle Replace the front wheel axle.Incorrect tire pressure Adjust to the specified tire pres-sure.Worn, deformed, or incorrect tire Replace the tire.Heavy steeringSteering ring nut is tightened tootight. Tighten the steering ring nut to thespecified torque.Bent lower bracket Replace the lower bracket.Broken bearing or bearing race Replace the bearing and bearingrace as a set.Incorrect tire pressure Adjust to the specified tire pres-sure.Front wheel vibrationLoose spoke Tighten the spoke and adjust therunout.Damaged or worn wheel bearing Replace the wheel bearing.Worn, deformed, or incorrect tire Replace the tire.Loose wheel axle or wheel axlenutTighten the wheel axle or wheelaxle nut to the specified torque.Loose wheel axle pinch bolt Tighten the wheel axle pinch boltto the specified torque.Incorrect front fork oil level Adjust to the specified front fork oillevel.Symptom Possible cause Actions