Honda CRF450X, Owner'S Manual

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Adjustments for Competition
117
Front Suspension Adjustments
4. Set the axle holder of the slider in a vise with
a piece of wood or soft jaws to avoid to
damage.
Over-tightening the vise can damage the axle
holder.
5. Push out the fork damper piston rod from the
axle holder of the slider by pushing the fork
damper.
Apply pressure to the fork damper and insert
the piston base (5) or mechanic's stopper tool
between the axle holder and lock nut.
Measure the thread length again.
Standard:
11 – 13 mm (0.43 – 0.51 in)
6. Install the push rod (6) into the piston rod
until it stops.
Check the push rod installation by turning the
push rod right and left.
7. Install a new O-ring (7) to the fork centre bolt
(8). Install the fork centre bolt to the fork
damper piston rod aligning the centre bolt
adjusting rod (9) with the push rod. Tighten
the fork centre bolt fully by hand.
NOTICE
(2) lock nut (7) O-ring
(5) piston base (8) fork centre bolt
(6) push rod (9) centre bolt adjusting
rod
8. Measure the length of the lock nut (2) and
fork centre bolt (8) clearance.
Standard
: 1.5 – 2.0 mm (0.06 – 0.08 in)
If the clearance is out of specification, check the
lock nut and centre bolt installation.
(2) lock nut (8) fork centre bolt
9. Tighten the lock nut (2) to the fork centre bolt
(8) closely by hand. Tighten the lock nut to
the specified torque:
22 N·m (2.2 kgf·m, 16 lbf·ft)
(2) lock nut
(8) fork centre bolt
10.Apply fork oil to the fork centre bolt O-ring
(9).
Remove the piston base or mechanic's stopper
tool while pushing to the fork damper.
Install the fork centre bolt to the axle holder
and tighten it to the specified torque:
69 N·m (7.0 kgf·m, 51 lbf·ft)
(9) fork centre bolt O-ring
11.Measure the length (10) between the axle
holder and outer tube.
12.Compare the length at assembly and at
disassembly. They should be the same length.
If the length at assembly is longer than at
disassembly, check the fork centre bolt and lock
nut installation.
Standard:
317 ± 2 mm (12.5 ± 0.08 in)
(10) length
(cont’d)
(8)
(7)
(9)
(5)
(2)
(6)
(2)
(8)
1.5 – 2.0 mm
(0.06 – 0.08 in)
(8)
(2)
(9)
(10)
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