Yamaha WR450F, Owner'S Service Manual

Page: 278 / 794

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INSP
ADJ
REAR SHOCK ABSORBER SPRING PRELOAD
ADJUSTMENT
REAR SHOCK ABSORBER SPRING
PRELOAD ADJUSTMENT
1. Elevate the rear wheel by placing the suit-
able stand under the engine.
2. Remove:
• Rear frame
3. Loosen:
• Locknut
1
4. Adjust:
• Spring preload
By turning the adjuster
2
.
* For EUROPE
NOTE:
• Be sure to remove all dirt and mud from
around the locknut and adjuster 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 adjuster beyond
the maximum or minimum setting.
5. Tighten:
• Locknut
6. Install:
• Rear frame (upper)
• Rear frame (lower)
Stiffer
→
Increase the spring preload.
(Turn the adjuster
2
in.)
Softer
→
Decrease the spring preload.
(Turn the adjuster
2
out.)
Spring length (installed)
a
:
Standard length Extent of adjustment
252.5 mm (9.94 in)
* 251.5 mm (9.90 in)
238.5 ~ 258.5 mm
(9.39 ~ 10.18 in)
T
R
.
.
38 Nm (3.8 m · kg, 27 ft · lb)
T
R
.
.
32 Nm (3.2 m · kg, 23 ft · lb)