Honda crf250r 2012 User Manual (English)

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110 Adjustments for Competition

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

3.9 in (100 mm) 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 tube/slider, which

may contain air bubbles and/or metal particles,

from the sealed cartridge to provide more

consistent damping.

(1) compression damping adjuster

(2) rebound damping adjuster

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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 motos. Be sure the fork is

fully extended with the front tire off the ground

when you release the pressure.

The standard air pressure is 0 psi (0 kPa, 0

kgf/cm

). 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) is in good condition.

4. Install and tighten the pressure release screw

to the specified torque:

1.0 lbf·ft (1.3 N·m, 0.1 kgf·m)

(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:

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 7 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.

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Honda crf250r 2012 Specifications

General

Engine Type	249cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	76.8mm x 53.8mm
Transmission	Close-ratio five-speed
Front Suspension Travel	12.2 inches
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	100/90-19
Seat Height	37.6 inches
Ground Clearance	13.2 inches
Fuel System	PGM-FI
Final Drive	Chain
Rear Suspension	Pro-Link Showa single shock with spring preload, rebound and compression damping adjustability