Yamaha YZ450F Manuel D'atelier Du Proprietaire page 560

REAR SHOCK ABSORBER
2. Tighten:
Adjuster 1
G
3. Adjust:
Spring length (installed) a
G
Standard
248 mm (9.76 in)
*263 mm (10.35 in)
* For EUROPE
NOTE:
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.
4. Tighten:
Locknut 1
G
Rear shock absorber
1. Install:
Dust seal 1
G
O-ring 2
G
Collar 3
G
NOTE:
Apply the molybdenum disulfide grease on
G
the bearing.
Apply the lithium soap base grease on the
G
dust seals, O-rings and collars.
5 - 63
CHAS
Spring length (installed) a:
length
240.5 ~ 258.5 mm
(9.47 ~ 10.18 in)
*255.5 ~ 273.5 mm
(10.06 ~ 10.77 in)
New
Extent of
adjustment