Yamaha WR450FB 2012 Owner's Service Manual page 115

3.
Install:
•Bleed screw
Bleed screw
1.3 Nm (0.13 m·kgf, 0.94 ft-lbf)
EAS10X3116
CHECKING THE REAR SUSPENSION
1.
Stand the vehicle on a level surface.
EWA13120
A
WARNING
Securely support the vehicle ·so that there is
no danger of it falling over.
2.
Check:
• Rear shock absorber assembly
Gas leaks/oil leaks
~
Replace the rear"
shock absorber assembly.
Refer to "CHECKING THE REAR SHOCK
ABSORBER ASSEMBLY" ·on page
5-64.
3.
Check:
• Rear shock absorber assembly operation
• Rear suspension link pivots
Push down seat on the vehicle several times
and check if the rear shock absorber assem-
bly rebounds smoothly.
Rough movement
~
Repair.
Refer to "REAR SHOCK ABSORBER AS-
SEMBLY" on page
5-61.
EAS10X3117
ADJUSTING THE REAR SHOCK ABSORB-
ER ASSEMBLY
EWA13120
AwARNING
Securely support the vehicle so that there is
no danger of it falling
ov~r.
Spring preload
ECA13590
Never go beyond the maximum or minimum
adjustment positions.
PERIODIC MAINTENANCE
1. Remove:
• Rearframe
Refer to "REAR SHOCK ABSORBER AS-
SEMBLY" on page
5-61.
2.
Adjust:
• Spring preload
TYYTYYTTTTTTTTTTTTTTTTTTTTTTYTTT
a. Loosen the locknut
"1 ". ·
b. Loosen the adjusting ring "2" until there is
some clearance between the spring and ad-
justing ring.
c. Measure the spring free length "a".
I
d. Turn the adjusting ring
in
direction "b" or "c".
Direction "b"
Spring preload is increased (suspen-
sion is harder).
Direction "c"
Spring preload is decreased (suspen-
sion is softer).
~
Spring installed length "d"
Minimum
Position in which the· spring is
turned in 1.5 mm (0.06 in) from
its free length.
Standard
Position in which the spring is
turned in 18 mm (0.71 in) from its
free length. .
Maximum
Position in which the spring is
turned in 18 mm (0.71 in) from its
free length.
TIP~~~~~~~~~~~~~~
•Be sure to remove all dirt and mud from
around the locknut and adjusting ring before
· adjustment.
3-27
• The length of the spring (installed) changes
1.5 mm (0.06 in) per turn of the adjusting ring.