Fork Oil Adjustment - Honda CRF450X 2020 Owner's Manual & Competition Handbook

Front Suspension Adjustments

Fork Oil Adjustment

1. Remove the front suspension (page 100).
2. Disassemble the fork outer tube (page 102).
3. Disassemble the fork damper (page 107).
Fork Oil Capacity:
Standard 28.6 Ibf/in (5.0 N/mm) Fork Spring
2 scribe marks or
no mark
(factory products)
12.2 US oz
Standard oil capacity
(361 cm 3 )
13.2 US oz
Maximum oil capacity
3
(389 cm )
10.3 US oz
Minimum oil capacity
(304 cm 3 )
Example: Front fork characteristics when a
standard spring
Oil capacity 13.2 US oz (389 cm
(MAX)
Oil capacity 12.2 US oz (361 cm
(STANDARD)
Oil capacity 10.3 US oz (304 cm
(MIN)
Stroke (mm)
142
Adjustments for Competition
Optional Soft 27.4 Ibf/in (4.8 N/mm) Fork Spring
Standard oil capacity
Maximum oil capacity
Minimum oil capacity
Optional Stiff 29.7 Ibf/in (5.2 N/mm) Fork Spring
Slightly stiffer
as it nears full
compression.
Slightly softer
as it nears full
compression.
Standard oil capacity
3
)
Maximum oil capacity
3 )
Minimum oil capacity
3 )
4. Assemble the fork damper (page 112).
5. Refilling the fork oil (page 103).
6. Install the front suspension (page 104).
No mark
12.1 US oz
(359 cm 3 )
Slightly stiffer
13.1 US oz
as it nears full
(387 cm 3 )
compression.
Slightly softer
10.2 US oz
as it nears full
(301 cm 3 )
compression.
3 scribe marks
12.0 US oz
(355 cm 3 )
Slightly stiffer
13.0 US oz
as it nears full
(383 cm 3 )
compression.
Slightly softer
10.1 US oz
as it nears full
(298 cm 3 )
compression.