Honda CRF450RX 2020 Owner's Manual & Competition Handbook page 117

Suspension
7. Push the outer tube until the fork center bolt
lock nut (2) is fully exposed and install the
piston base (13) or mechanic's stopper tool
between the axle holder (12) and fork center
bolt lock nut.
Measure the thread length again.
Standard: 0.35 – 0.43 in (9 – 11 mm)
• Piston base 07958-2500001
8. Install the push rod (14) into the piston rod (15)
until it stops.
(2)
0.35 – 0.43 in
(9 – 11 mm)
(2) fork center bolt lock nut (14) push rod
(12) axle holder (15) piston rod
(13) piston base
112
Servicing Your Honda
9. Apply fork oil to new O-ring (16) and install it
to the fork center bolt (17).
Install the fork center bolt to the fork damper
piston rod (15) by aligning the each flat-side of
the fork center bolt adjusting rod and the push
rod (14).
Tighten the fork center bolt fully by hand.
(12)
(13)
(15)
(15)
(14)
(14) push rod
(15) piston rod
(14)
10. Measure the clearance between the fork center
bolt lock nut (2) and fork center bolt (17).
Standard: 0.06 – 0.08 in (1.5 – 2.0 mm)
If the clearance is out of specification, check the
fork center bolt lock nut and fork center bolt
installation.
0.06 – 0.08 in
(1.5 – 2.0 mm)
(2) fork center bolt lock nut (17) fork center bolt
11. Tighten the fork center bolt lock nut (2) to the
Align
(16)
(2) fork center bolt lock nut
(17)
(17) fork center bolt
(16) O-ring (new)
12. Apply locking agent to the fork center bolt
(17) fork center bolt
(2)
(17)
(17) fork center bolt
fork center bolt (17) closely by hand. Tighten
the fork center bolt lock nut to the specified
torque:
21 lbf·ft (28 N·m, 2.9 kgf·m)
(2)
(17)
threads.
Remove the piston base or mechanic's stopper
tool while pushing the outer tube.
Install the fork center bolt (17) to the axle
holder and tighten it to the specified torque:
51 lbf·ft (69 N·m, 7.0 kgf·m)
(17)