Troubleshooting Of Steering/Handling - Yamaha YZ250FM 2021 Owner's Service Manual

Symptom
Rear suspension is soft
Oil leaking from rear shock
absorber
EAM30515

TROUBLESHOOTING OF STEERING/HANDLING

Symptom
Handlebar wobble
Heavy steering
Front wheel vibration
Possible cause
Oil leaking from rear shock
absorber
Gas leaking from rear shock
absorber
Fatigued or damaged rear shock
absorber spring
Improperly adjusted rear shock
absorber spring preload (soft)
Improperly adjusted rear shock
absorber rebound damping (soft)
Improperly adjusted rear shock
absorber compression damping
(soft)
Bent, damaged, or corroded rear
shock absorber rod
Damaged oil seal lip
Possible cause
Loose lower ring nut
Worn bearing or bearing race
Warped front fork
Bent front wheel axle
Incorrect tire pressure
Worn, deformed, or incorrect tire
Lower ring nut is tightened too
tight.
Bent lower bracket
Broken bearing or bearing race
Incorrect tire pressure
Loose spoke
Damaged or worn wheel bearing
Worn, deformed, or incorrect tire
Loose wheel axle or wheel axle
nut
Loose wheel axle pinch bolt
Incorrect front fork oil level
9-10
TROUBLESHOOTING
Actions
Replace the rear shock absorber.
Replace the rear shock absorber.
Replace the rear shock absorber.
Adjust the spring preload.
Adjust the rebound damping.
Adjust the compression damping.
Replace the rear shock absorber.
Replace the rear shock absorber.
Actions
Tighten the lower ring nut to the
specified torque.
Replace the bearing and bearing
race as a set.
Repair or replace the front fork.
Replace the front wheel axle.
Adjust to the specified tire pres-
sure.
Replace the tire.
Tighten the lower ring nut to the
specified torque.
Replace the lower bracket.
Replace the bearing and bearing
race as a set.
Adjust to the specified tire pres-
sure.
Tighten the spoke and adjust the
runout.
Replace the wheel bearing.
Replace the tire.
Tighten the wheel axle or wheel
axle nut to the specified torque.
Tighten the wheel axle pinch bolt
to the specified torque.
Adjust to the specified front fork oil
level.