Yamaha YZ250 2022, Owner'S Service Manual

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REAR SHOCK ABSORBER ASSEMBLY
4-57
EAM30063
HANDLING THE REAR SHOCK ABSORBER
WARNING
EWA13740
This rear shock absorber contains highly
compressed nitrogen gas. Before handling
the rear shock absorber, read and make sure
you understand the following information.
The manufacturer cannot be held responsi-
ble for property damage or personal injury
that may result from improper handling of
the rear shock absorber.
• Do not tamper or attempt to open the rear
shock absorber.
• Do not subject the rear shock absorber to
an open flame or any other source of high
heat. High heat can cause an explosion due
to excessive gas pressure.
• Do not deform or damage the rear shock
absorber in any way. Rear shock absorber
damage will result in poor damping perfor-
mance.
TIP
A break-in is required up to about 50 km of run-
ning.
EAM30064
DISPOSING OF A REAR SHOCK ABSORBER
Before disposing the rear shock absorber, be
sure to extract the nitrogen gas from valve “1”.
WARNING
EWA19340
• Wear protective glasses to prevent your
eyes from damage due to possible gas or
metal chips scattered.
• To dispose of a damaged or a worn-out rear
shock absorber, take the unit to your
Yamaha dealer for this disposal procedure.
EAM30065
REMOVING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Use a maintenance stand to raise the rear
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
•
Rear shock absorber assembly lower bolt “1”
TIP
While removing the rear shock absorber assem-
bly lower bolt, hold the swingarm so that it does
not drop down.
3. Remove:
• Rear shock absorber assembly upper bolt
•
Rear shock absorber assembly
EAM30067
CHECKING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Check:
• Rear shock absorber rod
Bends/damage

Replace the rear shock
absorber assembly.
•
Rear shock absorber
Gas leaks/oil leaks

Replace the rear shock
absorber assembly.
• Spring
Damage/wear

Replace.
•
Spring guide
Damage/wear

Replace.
•
Bearing
Damage/wear

Replace.
• Bolt
Bends/damage/wear

Replace.
EAM30068
CHECKING THE CONNECTING ARM AND
RELAY ARM
1. Check:
•
Connecting arm
• Relay arm
Damage/wear

Replace.
2. Check:
•
Bearing
• Collar
1