Front Fork Setting Parts; Rear Suspension Setting; Choosing Set Length - Yamaha WR450FB 2012 Owner's Service Manual

TIP
Generally a stiff spring gives a stiff riding feel-
ing. Rebound damping tends to become weak-
er, resulting in lack of a sense of contact with
the road surface or in a vibrating handlebar.
EAS1DX3131

FRONT FORK SETTING PARTS

• Front fork spring "1"
SPRING
RATE SPRING PART
TYPE
N/mm NUMBER
(kg/mm)
3.9 1C3-23141-A1
(0.398)
4.0 1C3-23141-B1
(0.408)
4.1 1C3-23141-C1
(0.418)
SOFT
4.2 1C3-23141-D1
(0.428)
4.3 1C3-23141-E1
(0.438)
4.4 1C3-23141-F1
(0.449)
4.5 1DX-23141-50
STD
(0.459) 1C3-23141-G1
4.6 1C3-23141-H1
(0.469)
STIFF
4.7 1C3-23141-J1
(0.479)
TIP
The I.D. mark (slits) "a" is proved on the end of
the spring.
a
I.D.
MARK
(slits)
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EAS1DX3132

REAR SUSPENSION SETTING

The rear suspension setting should be made
depending on the rider's feeling of an actual run
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and the circuit conditions.
The rear suspension setting includes the fol-
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lowing two factors:
1. Setting of spring preload
• Change the set length of the spring.
—
• Change the spring.
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2. Setting of damping force
• Change the rebound damping.
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• Change the compression damping.
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EAS1DX3133

CHOOSING SET LENGTH

1. Place a stand or block under the engine to
put the rear wheel above the floor, and mea-
sure the length "a" between the rear wheel
axle center and the rear fender holding bolt.
4-3
CHASSIS
1