Yamaha YZ250 2022 Owner's Service Manual page 251

Symptom
Front fork is soft
Leaking oil from front fork
Rear suspension is hard
Possible cause
Fatigued or broken fork spring
Incorrect oil viscosity (low)
Incorrect oil level (low)
Improperly adjusted spring pre-
load (soft)
Improperly adjusted rebound
damping (soft)
Improperly adjusted compression
damping (soft)
Bent, damaged, or corroded inner
tube
Cracked or damaged outer tube
Improperly installed oil seal
Damaged oil seal lip
Incorrect oil level (high)
Loose damper rod assembly bolt
Damaged damper rod assembly
bolt copper washer
Cracked or damaged cap bolt O-
ring
Bent or damaged rear shock
absorber rod
Bent swingarm pivot shaft
Damaged or worn swingarm bear-
ing or bushing
Damaged or worn relay arm bear-
ing
Damaged or worn connecting arm
bearing
Improperly adjusted rear shock
absorber spring preload (hard)
Improperly adjusted rear shock
absorber rebound damping (hard)
Improperly adjusted rear shock
absorber compression damping
(hard)
9-10
TROUBLESHOOTING
Actions
Replace the fork spring.
Change to recommended fork oil.
Adjust to the specified oil level.
Adjust the spring preload.
Adjust the rebound damping.
Adjust the compression damping.
Replace the inner tube.
Replace the outer tube.
Replace the oil seal.
Replace the oil seal.
Adjust to the specified oil level.
Tighten the damper rod assembly
bolt to the specified torque.
Replace the damper rod assembly
bolt copper washer.
Replace the cap bolt O-ring.
Replace the rear shock absorber.
Replace the swingarm pivot shaft.
Replace the swingarm bearing or
bushing.
Replace the relay arm bearing.
Replace the connecting arm bear-
ing.
Adjust the spring preload.
Adjust the rebound damping.
Adjust the compression damping.