Yamaha YZ450F Owner's Service Manual page 168

9. Tighten:
• Base valve "1"
Base valve
28 Nm (2.8 m·kgf, 20 ft·lbf)
TIP
Hold the damper assembly with the cap bolt
ring wrench "2" and use the cap bolt wrench "3"
to tighten the base valve.
Cap bolt wrench
90890-01500
YM-01500
Cap bolt ring wrench
90890-01501
YM-01501
3
2
10.After filling, pump the damper assembly "1"
slowly up and down more than 10 times to
distribute the fork oil.
1
11.While protecting the damper assembly "1"
with a cloth and compressing fully, allow ex-
cessive oil to overflow on the base valve
side.
ECA32D1010
NOTICE
Take care not to damage the damper assem-
bly.
1
1
12.Allow the overflowing oil to escape at the
hole "a" in the damper assembly.
TIP
The overflow measures about 8 cm
oz, 0.28 lmp oz).
a
13.Check:
• Damper assembly smooth movement
Tightness/binding/rough spots  Repeat
the steps 1 to 12.
14.Install:
• Dust seal "1"
• Oil seal clip "2"
• Oil seals "3"
• Washer "4"
• Outer tube bushing "5"
(to the inner tube "6")
ECA32D1010
NOTICE
Make sure that the numbered side of the oil
seal faces bottom side.
4-44
FRONT FORK
3
New
New
New
(0.27 US