Front Suspension Adjustments; Front Suspension Air Pressure - Honda CRF450R 2011 Owner's Manual

Front Suspension Adjustments

Front Suspension Adjustments
The front suspension can be adjusted for the rider's
weight and riding conditions by using one or more
of the following methods:
• Oil volume — The effects of higher or lower
fork oil capacity are only felt during the final
100 mm (3.9 in) of fork travel.
• Compression damping — Turning the
compression damping adjuster (1) adjusts how
quickly the fork compresses.
• Rebound damping — Turning the rebound
damping adjuster (2) adjusts how quickly the
fork extends.
• Fork springs — Optional springs are
available in softer and stiffer types than the
standard rate (page 160).
(1)
(1) compression damping adjuster
(2) rebound damping adjuster
116
Adjustments for Competition

Front Suspension Air Pressure

Air is an unstable gas which builds up pressure as it
is worked (such as in a fork). Air pressure acts as a
progressive spring and affects the entire range of
fork travel. This means the fork action on your CRF
will get stiffer during a race. For this reason, release
built-up air pressure in the fork legs between heats.
Be sure the fork is fully extended with the front tyre
off the ground when you release the pressure.
The standard air pressure is 0 kPa (0 kgf/cm
psi). You may relieve accumulated air pressure in
the fork legs by using the fork air pressure release
screws. The front wheel should be off the ground
before you release the pressure. The air pressure
should be adjusted according to the altitude and
outside temperature.
1. Place an optional workstand under the engine,
so that the front wheel is off the ground.
Do not adjust air pressure with the front wheel
on the ground as this will give false pressure
readings.
2. Remove the fork air pressure release screw (1).
3. Check that the O-ring (2) is in good condition.
(2)
4. Install and tighten the fork air pressure release
screw to the specified torque:
1.2 N·m (0.1 kgf·m, 0.9 lbf·ft)
(1)
2 , 0
(2)
(1) fork air pressure release screw (2) O-ring