Yamaha 2009 YFM25RY, Service Manual, Page: 90 / 293

CHASSIS
3-25
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EAS4D3F031
ADJUSTING THE FRONT SHOCK
ABSORBER ASSEMBLIES (for 4D3H,
4D3M)
WARNING
EWA14920
Always adjust the spring preload for both
front shock absorber assemblies to the
same setting. Uneven adjustment can
cause poor handling and loss of stability.
Spring preload
ECA4D3F011
Never attempt to turn the adjusting ring
beyond the maximum or minimum setting.
1. Adjust:
• Spring preload
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a. Elevate the front wheels by placing a suit-
able stand under the frame.
b. Loosen the locknut “1”.
c. Turn the adjusting ring “2” in direction “a” or
“b”.
TIP
Be sure to remove all dirt and mud from
around the locknut and adjusting ring before
adjustment.
d. Tighten the locknut.
TIP
Always tighten the locknut against the adjust-
ing ring, then torque it to specification.
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Rebound damping
ECA4D3F008
Do not force the adjuster past the minimum
or maximum extent of adjustment. The
adjuster may be damaged.
1. Adjust:
• Rebound damping
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a. Turn the adjusting screw “1” in direction “a”
or “b”.
Direction “a”
Spring preload is increased (suspension
is harder).
Direction “b”
Spring preload is decreased (suspension
is softer).
Spring preload adjusting length
“c”
Minimum
209.6 mm (8.25 in)
Standard
206.0 mm (8.11 in)
Maximum
197.6 mm (7.78 in)
Front shock absorber locknut
42 Nm (4.2 m·kg, 31 ft·lb)
Direction “a” (turn in)
Rebound damping is increased
(suspension is harder).
Direction “b” (turn out)
Rebound damping is decreased
(suspension is softer).