Yamaha YFZ450S 2003 Service Manual page 121

ADJUSTING THE REAR SHOCK ABSORBER
a
b
2
1
1
2
c
3 - 49
3. Disconnect the air filter case breather hose
1, and then remove the air filter case 2
with the air intake duct.
4. Adjust:
• spring preload
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a. Elevate the rear 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.
Spring preload is
Direction a
increased (suspension
is harder).
Spring preload is
Direction b
decreased (suspension
is softer).
Adjusting length c
Standard: 244 mm (9.61 in)
Minimum: 237 mm (9.33 in)
Maximum: 251 mm (9.88 in)
NOTE:
_
• Be sure to remove all dirt and mud from
around the locknut and adjusting ring before
adjustment.
• The length of the spring (installed) changes
1.5 mm (0.06 in) per turn of the adjuster.
CAUTION:
_
Never attempt to turn the adjusting ring
beyond the maximum or minimum setting.
d. Tighten the locknut 1 with a steering nut
wrench 3.
NOTE:
Set the torque wrench at a right angle to the
steering nut wrench.
CHK
ADJ
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