Yamaha yz250 2015, Owner'S Manual

Page: 135 / 174

5-22
FRONT FORK
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"
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.
2. Tighten:
• Damper assembly "1"
Use the cap bolt ring wrench "2" to
tighten the damper assembly with
specified torque.
3. Adjust:
• Front fork top end "a"
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:
320 cm
3
(11.3 Imp oz,
10.8 US oz)
Extent of adjustment:
300–365 cm
3
(10.6–12.9 Imp oz,10.1–
12.3 US oz)
Damper assembly:
30 Nm (3.0 m•kg, 22
ft•lb)
Cap bolt ring wrench:
YM-01501/90890-01501
Front fork top end (stan-
dard) "a":
0 mm (0 in)