Yamaha YZ450F 2008 Manuel D'atelier Du Proprietaire page 149

If the adjuster is installed out of spec-
ification, proper damping force can-
not be obtained.
29. Tighten:
• Adjuster (locknut) "1"
Adjuster (locknut):
29 Nm (2.9 m•kg, 21
ft•lb)
Hold the locknut "2" and tighten the
adjuster with specified torque.
30. Install:
• Adjuster "1"
Adjuster:
55 Nm (5.5 m•kg, 40
ft•lb)
To inner tube.
31. Fill:
• Front fork oil "1"
From outer tube top.
Recommended oil:
Suspension oil "S1"
Standard oil amount:
3
350 cm (12.3 Imp oz,
11.8 US oz)
Extent of adjustment:
3
300–375 cm
(10.6–13.2 Imp oz,10.1–
12.7 US oz)
Never fail to make the oil amount
adjustment between the maximum
and minimum amount and always
adjust each front fork to the same
setting. Uneven adjustment can
cause poor handling and loss of
stability.
• Be sure to use recommended
fork oil. If other oils are used,
they may have an excessively ad-
verse effect on the front fork per-
formance.
• Never allow foreign materials to
enter the front fork.
32. Install:
• Damper assembly "1"
To outer tube.
Temporarily tighten the damper as-
sembly.
33. Install:
• Protector guide "1"
INSTALLING THE FRONT FORK
1. Install:
• Front fork "1"
• Temporarily tighten the pinch bolts
(lower bracket).
• Do not tighten the pinch bolts (up-
per bracket) yet.
5-22
FRONT FORK
2. Tighten:
• Damper assembly "1"
Damper assembly:
30 Nm (3.0 m•kg, 22
ft•lb)
Use the cap bolt ring wrench "2" to
tighten the damper assembly with
specified torque.
Cap bolt ring wrench:
YM-01501/90890-01501
3. Adjust:
• Front fork top end "a"
Front fork top end (stan-
dard) "a":
5 mm (0.20 in)
4. Tighten:
• Pinch bolt (upper bracket) "1"
Pinch bolt (upper brack-
et):
21 Nm (2.1 m•kg, 15
ft•lb)
• Pinch bolt (lower bracket) "2"
Pinch bolt (lower brack-
et):
21 Nm (2.1 m•kg, 15
ft•lb)
Tighten the lower bracket to speci-
fied torque. If torqued too much, it
may cause the front fork to mal-
function.