User Manual - Page 148

For 2019 CRF450X.

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