Yamaha YZ250F(Z), Owner'S Service Manual

Page: 159 / 196

5-22
FRONT FORK
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).
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.
28. Inspect:
• Gap "a" between the adjuster "1"
and locknut "2".
Out of specification
→
Retighten
and readjust the locknut.
If the adjuster is installed out of spec-
ification, proper damping force can-
not be obtained.
29. Tighten:
• Adjuster (locknut) "1"
Hold the locknut "2" and tighten the
adjuster with specified torque.
30. Install:
• Adjuster "1"
To inner tube.
31. Fill:
• Front fork oil "1"
From outer tube top.
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"
Cap bolt ring wrench:
YM-01501/90890-01501
Gap "a" between the ad-
juster and locknut:
0.5–1.0 mm (0.02–0.04
in)
Adjuster (locknut):
29 Nm (2.9 m•kg, 21
ft•lb)
Adjuster:
55 Nm (5.5 m•kg, 40
ft•lb)
Recommended oil:
Suspension oil "S1"
Standard oil amount:
350 cm
3
(12.3 Imp oz,
11.8 US oz)
*337 cm
3
(11.9 Imp oz,
11.4 US oz)
Extent of adjustment:
300–375 cm
3
(10.6–13.2 Imp
oz,10.1–12.7 US oz)
* Except for USA & CDN