Yamaha YZ450F(X) Owner's Service Manual page 150

tube with fork seal driver "3".
Fork seal driver:
YM-A0948/90890-01502
19. Install:
• Oil seal "1"
Press the oil seal into the outer tube
with fork seal driver "2".
Fork seal driver:
YM-A0948/90890-01502
20. Install:
• Stopper ring "1"
Fit the stopper ring correctly in the
groove in the outer tube.
21. Install:
• Dust seal "1"
Apply the lithium soap base grease
on the inner tube.
22. Check:
• Inner tube smooth movement
Tightness/binding/rough spots
→
Repeat the steps 15 to 21.
23. Measure:
• Distance "a"
→
Out of specification
the locknut.
Distance "a":
16 mm (0.63 in) or more
Between the damper
assembly "1" bottom
and locknut "2" bot-
tom.
24. Install:
• Collar "1"
• Fork spring "2"
To damper assembly "3".
Install the collar with its larger dia.
end "a" facing the fork spring.
25. Install:
• Damper assembly "1"
To inner tube "2".
To install the damper assembly
into the inner tube, hold the inner
tube aslant. If the inner tube is held
5-21
vertically, the damper assembly
may fall into it, damaging the valve
inside.
26. Loosen:
• Rebound damping adjuster "1"
• Loosen the rebound damping ad-
juster finger tight.
• Record the set position of the ad-
juster (the amount of turning out the
fully turned in position).
Turn into
27. Install:
• Push rod "1"
• Copper washer "2"
• Adjuster "3"
To damper assembly "4".
• While compressing the inner tube
"5", set the cap bolt ring wrench "7"
between the inner tube and locknut
"6".
• Fully finger tighten the adjuster onto
the damper assembly.
Cap bolt ring wrench:
28. Inspect:
• Gap "a" between the adjuster "1"
and locknut "2".
Out of specification
and readjust the locknut.
Gap "a" between the ad-
juster and locknut:
FRONT FORK
YM-01501/90890-01501
→
Retighten
0.5–1.0 mm (0.02–0.04
in)