Yamaha 2011 WR250FA, Owner'S Service Manual

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3-35
CHASSIS
CHECKING THE FRONT FORK
1. Inspect:
• Front fork smooth action
Operate the front brake and stroke the front
fork.
Unsmooth action/oil leakage
→
Repair or re-
place.
CLEANING THE FRONT FORK OIL SEAL
AND DUST SEAL
1. Remove:
• Protector
• Dust seal "1"
Use a thin screw driver, and be careful not to
damage the inner fork tube and dust seal.
2. Clean:
• Dust seal "a"
• Oil seal "b"
• Clean the dust seal and oil seal after every
run.
• Apply the lithium soap base grease on the in-
ner tube.
RELIEVING THE FRONT FORK INTERNAL
PRESSURE
If the front fork initial movement feels stiff dur-
ing a run, relieve the front fork internal pres-
sure.
1. Elevate the front wheel by placing a suitable
stand under the engine.
2. Remove the air bleed screw "1" and release
the internal pressure from the front fork.
3. Install:
• Air bleed screw
ADJUSTING THE FRONT FORK REBOUND
DAMPING FORCE
1. Adjust:
• Rebound damping force
By turning the adjuster "1".
Air bleed screw:
1 Nm (0.1 m•kg, 0.7 ft•lb)
Stiffer "a"
→
Increase the rebound damp-
ing force. (Turn the adjuster "1" in.)
Softer "b"
→
Decrease the rebound damp-
ing force. (Turn the adjuster "1" out.)
Extent of adjustment:
Maximum Minimum
Fully turned in posi-
tion 20 clicks out (from
maximum position)