Yamaha YZ450F Manuel D'atelier Du Proprietaire page 556

REAR SHOCK ABSORBER
EC583000
REMOVAL POINTS
EC583320
Bearing
1. Remove:
Stopper ring (upper bearing) 1
G
NOTE:
Press in the bearing while pressing its outer
race and remove the stopper ring.
2. Remove:
Upper bearing 1
G
NOTE:
Remove the bearing by pressing its outer race.
3. Remove:
Lower bearing 1
G
NOTE:
Remove the bearing by pressing its outer race.
EC584000
INSPECTION
Rear shock absorber
1. Inspect:
Damper rod 1
G
Bends/damage → Replace absorber
assembly.
Shock absorber 2
G
Oil leaks → Replace absorber assem-
bly.
Gas leaks → Replace absorber assem-
bly.
Spring 3
G
Damage → Replace spring.
Fatigue → Replace spring.
Move spring up and down.
Spring guide 4
G
Wear/damage → Replace spring guide.
Bearing 5
G
Free play exists/unsmooth revolution/
rust → Replace.
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CHAS