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Fork Oil Adjustment
1. Remove the front suspension (page 98).
2. Disassemble the fork outer tube (page 100).
3. Disassemble the fork damper (page 105).
Fork Oil Capacity:
(CRF450RX)
Standard 27.4 Ibf/in (4.8 N/mm) Fork Spring
1 scribe mark or
no mark (factory products)
(CRF450R/RWE)
Standard 28.6 Ibf/in (5.0 N/mm) Fork Spring
2 scribe marks or
no mark (factory products)
12.3 US oz
CRF450RX
Standard
(363 cm
oil capacity
12.0 US oz
CRF450R/
RWE
(356 cm
13.3 US oz
CRF450RX
Maximum
(394 cm
oil capacity
13.2 US oz
CRF450R/
RWE
(389 cm
10.5 US oz
CRF450RX
Minimum
(309 cm
oil capacity
10.3 US oz
CRF450R/
RWE
(304 cm
Example: Front fork characteristics when a standard spring
(CRF450RX)
Oil capacity 13.3 US oz (394 cm
(MAX)
Oil capacity 12.3 US oz (363 cm
(STANDARD)
Oil capacity 10.5 US oz (309 cm
(MIN)
Stroke (mm)
(CRF450R/RWE)
(CRF450RX)
Optional Soft 26.3 Ibf/in (4.6 N/mm) Fork Spring
3
)
3
)
Slightly stiffer
3
)
(CRF450R/RWE)
as it nears full
Optional Soft 27.4 Ibf/in (4.8 N/mm) Fork Spring
compression.
3
)
Slightly softer
3
)
as it nears full
compression.
3
)
3
)
Standard
oil capacity
3
)
Maximum
oil capacity
3
)
Minimum
oil capacity
Oil capacity 13.2 US oz (389 cm
3
)
(MAX)
Oil capacity 12.0 US oz (356 cm
3
)
(STANDARD)
3
Oil capacity 10.3 US oz (304 cm
)
(MIN)
Stroke (mm)
1 scribe mark
1 scribe mark
12.2 US oz
CRF450RX
(361 cm
3
)
CRF450R/
12.2 US oz
3
RWE
(361 cm
)
13.3 US oz
CRF450RX
Slightly stiffer
(392 cm
3
)
as it nears full
CRF450R/
13.3 US oz
compression.
RWE
(394 cm
3
)
10.4 US oz
CRF450RX
Slightly softer
3
(307 cm
)
as it nears full
CRF450R/
10.5 US oz
compression.
RWE
(309 cm
3
)
Front Suspension Adjustments
(CRF450RX)
Optional Stiff 28.6 Ibf/in (5.0 N/mm) Fork Spring
2 scribe marks
(CRF450R/RWE)
Optional Stiff 29.7 Ibf/in (5.2 N/mm) Fork Spring
3 scribe marks
11.8 US oz
CRF450RX
(350 cm
Standard
oil capacity
CRF450R/
11.8 US oz
RWE
(350 cm
12.9 US oz
CRF450RX
(381 cm
Maximum
oil capacity
CRF450R/
13.0 US oz
RWE
(383 cm
10.0 US oz
CRF450RX
Minimum
(296 cm
oil capacity
CRF450R/
10.1 US oz
RWE
(299 cm
4. Assemble the fork damper (page 110).
5. Refilling the fork oil (page 101).
6. Install the front suspension (page 102).
Adjustments for Competition
3
)
3
)
Slightly stiffer
3
)
as it nears full
compression.
3
)
Slightly softer
3
)
as it nears full
compression.
3
)
145
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