Front Suspension Adjustments; Front Suspension Air Pressure; Front Suspension Damping - Honda CRF250R 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 156)
The inverted fork on your CRF features sealed
damper cartridges with dual (separate air and oil)
chambers to prevent aeration. The design also
isolates the oil in each fork/damper, which may
contain air bubbles and/or metal particles, from the
sealed cartridge to provide more consistent
damping.
(1)
(2)
(1) compression damping adjuster
(2) rebound damping adjuster
112
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 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 a 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 pressure release screw (1).
3. Check that the O-rings (2) are in good
condition.
4. Install and tighten the pressure release screw to
the specified torque:
1.3 N·m (0.1 kgf·m, 1.0 lbf·ft)
(1)
(2)
(1) pressure release screw (2) O-rings

Front Suspension Damping

Compression Damping Adjustment
This adjustment affects how quickly the fork
compresses. The fork compression damping
adjuster has 16 positions or more. Turning the
compression damping adjuster screw (1) one full
turn changes the adjuster 4 positions. To adjust the
adjuster to the standard position, proceed as
follows:
, 0
2
Turn the adjuster clockwise until it will no longer
turn (lightly seats). This is the full hard position.
The adjuster is set in the standard position when
the adjuster is turned counterclockwise 6 clicks.
Make sure that both fork legs are adjusted to the
same position.
Rebound Damping Adjustment
The fork rebound damping adjuster has 16
positions or more. Turning the rebound damping
adjuster screw (2) one full turn clockwise advances
the adjuster 4 positions. To adjust the rebound
damping to the standard setting, proceed as
follows:
Turn the adjuster clockwise until it will no longer
turn (lightly seats). This is the full hard position.
The adjuster is set in the standard position when
the adjuster is turned counterclockwise 11 clicks.
Make sure that both fork legs are adjusted to the
same position.