Fork Damper Installation - Honda CRF450L 2019 Owner's Manual & Off-Road Handbook

Suspension
17. Blow out any oil from the oil hole (10) of the
fork damper assembly (4) using compressed
air.
Wipe off the oil completely from the fork
damper.
18. If your cannot use compressed air, remove the
fork air pressure release screws (12) from the
fork bolt assembly.
Hold the fork damper upside down for 20
minutes and drain the fork oil.
Apply recommended fork oil to a new O-ring
(13), and then install a new O-rings on the air
pressure release screws (12).
Tighten the air pressure release screws to the
specified torque:
1.0 lbf·ft (1.3 N·m, 0.1 kgf·m)
(4)
(10)
(4) fork damper assembly
(10) oil hole
(12) air pressure release screws
(13) O-rings (new)
118
Servicing Your Honda
19. Fully stroke the piston rod (2) by pushing
down the fork damper assembly (4).
Check the piston rod for smooth operation.
If the piston rod operation is not smooth, check
the piston rod for bends or damage.
(4)
(2)
(2) fork damper piston rod
(4) fork damper assembly
(12) (13)

Fork Damper Installation

1. Drain the fork oil from the fork assembly (1)
by placing it upside down.
(About (0.2 US oz (5.4 cm ) of fork oil will be
3
left in the fork assembly when it is left inverted
for about 20 minutes at 20 °C/68 °F)
(1)
(1) fork assembly
To properly dispose of drained fluids, refer to You
& the Environment on page 160.
NOTICE
Improper disposal of drained fluids is harmful to
the environment.
Amount of fork oil left in the fork
(without damper and spring)
minute
5 10 20 35
°C/°F
30/86 6.5 5.7 5.2 4.5
20/68 6.7 6.2 5.4 4.7
10/50 7.3 6.4 5.6 5
0/32 8.6 8.2 7.9 7.6
unit: cm 3
55 85 145
4.1 3.7 3.3
4.4 3.8 3.5
4.6 4.2 3.8
7.3 6.8 6