Yamaha YZ250 2021 Owner's Manual page 127

Symptom
Front wheel vibration
Rear wheel vibration
Possible cause
Incorrect wheel balance
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
Incorrect wheel balance
Loose spoke
Damaged or worn wheel bearing
Worn, deformed, or incorrect tire
Loose wheel axle nut
Loose swingarm pivot shaft
Bent or damaged swingarm
Damaged or worn swingarm bear-
ing or bushing
7-12
TROUBLESHOOTING
Actions
Adjust the wheel balance.
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.
Adjust the wheel balance.
Tighten the spoke and adjust the
runout.
Replace the wheel bearing.
Replace the tire.
Tighten the wheel axle nut to the
specified torque.
Tighten the swingarm pivot shaft
to the specified torque.
Replace the swingarm bearing.
Replace the swingarm bearing or
bushing.