Yamaha YZ450F(W) Owner's Service Manual page 508

FRONT FORK
9. Check that the damper assembly is fully
stretched.
Not fully stretched → Repeat the steps 2 to
8.
10. Tighten:
• Base valve 1
NOTE:
Hold the damper assembly with the cap bolt
ring wrench 2 and use the cap bolt wrench 3
to tighten the base valve with specified torque.
Cap bolt wrench:
YM-01500/90890-01500
Cap bolt ring wrench:
YM-01501/90890-01501
11. After filling, pump the damper assembly 1
slowly up and down more than 10 times to
distribute the fork oil.
12. While protecting the damper assembly 1
with a rag and compressing fully, allow
excessive oil to overflow on the base valve
side.
CAUTION:
Take care not to damage the damper
assembly.
13. Allow the overflowing oil to escape at the
hole a in the damper assembly.
5 - 35
CHAS
29 Nm (2.9 m · kg, 21 ft · lb)