Adjustments for Competition
109
Front Suspension Adjustments
Both compression and rebound damping can be
increased by turning the adjuster clockwise.
Always start with full hard when adjusting
damping.
Do not turn the adjuster screw more than the
given positions or the adjuster may be damaged.
Be sure that the rebound and compression
adjusters are firmly located in a detent, and not
between positions.
NOTICE
Front Suspension Disassembly
• If your CRF is brand-new, put enough part-
throttle break-in time (about one hour) on it to
ensure that the suspension has worked in.
• For optimum performance, and extended fork
life, the fork should be completely
disassembled and cleaned after the first three
hours of riding. See the Shop Manual or your
Honda dealer for this service.
1. Place your CRF on an optional workstand or
equivalent support with the front wheel off the
ground.
2. Remove the front visor (page 103).
3. Remove the handlebar pad.
Remove the handlebar lower holder nuts,
washers, mounting rubbers (1) and handlebar
(2).
Keep the master cylinder upright to prevent air
from entering system.
NOTICE
Fork Springs
The fork springs in CRF’s are about right for
riders weighing between 68 and 73 kg (150 and
160 lbs) (less riding gear). So if you're a heavier
rider, you have to go up on the oil level or get a
stiffer spring. Do not use less oil than the
minimum specified for each spring or there will
be a loss of rebound damping control near full
extension. If the fork is too hard on big bumps,
turn the damping adjuster counterclockwise 1-
turn and lower the oil level in increments of 5
cm
3
(0.2 oz) in both fork legs until the desired
performance is obtained. Do not, however, lower
the oil level below the minimum oil level.
Minimum oil level:
Standard spring:
306 cm
3
(10.3 US oz,
10.8 Imp oz)
Softer spring:
311 cm
3
(10.5 US oz,
10.9 Imp oz)
Stiffer spring:
309 cm
3
(10.5 US oz,
10.9 Imp oz)
When adjusting oil levels, bear in mind that the
air in the fork will increase in pressure while
riding; therefore, the higher the oil level, the
higher the eventual pressure of any air in the
fork.
(1) rebound damping
(2) compression
adjuster
damping adjuster
(1)
(2)
F
orce (N)
Stroke (mm)
Oil level 402 cm
3
(13.6 US oz,
14.2 Imp oz) (MAX)
Oil level 332 cm
3
(11.2 US oz,
11.7 Imp oz) (STANDARD)
Oil level 306 cm
3
(10.3 US oz,
10.8 Imp oz) (MIN)
(cont’d)
(2)
(1)
(1) handlebar lower holder nuts/washers/mounting
rubbers
(2) handlebar
107-131.qxd 06.6.1 11:05 ページ109
Summary of Contents for CRF450X
Page 3: ...Honda CRF450X OWNER S MANUAL COMPETITION HANDBOOK Contents qxd 06 6 1 10 56 ページ2 ...
Page 12: ...6 Motorcycle Safety 001 030 qxd 06 6 1 10 57 ページ6 ...
Page 18: ...12 Before Riding 001 030 qxd 06 6 1 10 57 ページ12 ...
Page 28: ...22 Basic Operating Instructions 001 030 qxd 06 6 1 10 57 ページ22 ...
Page 156: ...150 Taking Care of Unexpected 142 168 qxd 06 6 1 11 08 ページ150 ...
Page 169: ...Technical Information 163 Wiring Diagram 142 168 qxd 06 6 1 11 08 ページ163 ...
