Fork Assembly - Honda CRF450R Owner's Manual

Fork Assembly

1. Drain the fork oil from the outer tube/slider
by placing it upside down.
(About 7 cc of fork oil will be left in the outer
tube/slider when it is left inverted for about 20
minutes at 20°C)
(1)
(1) outer tube/slider
Amount of fork oil left in the fork
(without damper and spring)
minute
5 10 20 35
°C/°F
30/86 7.1 5.9 4.7 4.2
20/68 10.6 8.2 7.1 5.9
10/50 11.8 8.3 7.2 6.2
0/32 12.9 10.6 9.4 8.2
Front Suspension Adjustments
2. Tighten the lock nut (2) fully and measure the
unit: cc thread length (A) as shown.
55 85 145
Standard: 0.43 – 0.51 in (11 – 13 mm)
3.5 3.5 3.5
Wipe the oil completely off the fork damper.
5.6 4.7 4.7
5.8 4.9 4.8
7.9 7.1 5.9
(2) lock nut
3. Wipe the oil completely off the fork spring
(3).
Install the fork spring.
Install the fork damper assembly (4) to the
outer tube/slider (1).
(3)
(1) outer tube/slider
(3) spring
(2)
(A)
(A) thread length
(4)
(1)
(4) fork damper assembly
(cont'd)
105
Adjustments for Competition