Honda CRF450R 2012 Service Manual

1
,
FRONT WHEEL/SUSPENSION/STEERING
Check: thaI/he Pour recommended damper oil in to a suitable con-
damper oil tainer until the steering damper is fully submerged .
temperature is
20'C (68"F). RE C OMMENDED DAMPER OIL :
Bleed any trapped
Pr o-Honda HP Fork Oil 5W or eq ui va le nt
• Check the damper oil for contamination.
• Do not allow foreign materials to enter the
damper oil.
Submerge the damper case into the oil.
Submerge the damper rod into the oil.
Shake
a new damper rod assembly until there are
no air bubbles.
air af rhe O.f'ing
searing surface by •
fUming /he ().n'ng.
Be careful not to damage the damper rod and
damper piston, especially around the damper
rod sliding surface.
DAMPER
CASE
~
In oi l:
\ I
C·RING
Bleed
any air out from the dampe r case and damper ~ ln = O = il: ===== D = A = M = P = E = R = P = ' = S = T = O =N ====~
piston following the procedure below :
,. Install the damper piston into the damper case,
pump the damper rod quickly.
NOTE:
• To open the piston valve, pump the piston rod
quickly.
2. Remove the damper piston from the damper
case.
3. Bring any air out from the damper case by using
your finger as shown.
4. Repeat steps 1 to 3 until there are no air bubbles
in the damper case and damper piston 3 times
for complete air bleeding .
Install the damper rod into the damper case care-
fully.
\ I
DAMPER ROD
AIR BUBBLES
14-43

Honda CRF450R 2012 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.5:1
Induction	Programmed Fuel Injection (PGM-FI), 46mm throttle body
Ignition	CDI
Transmission	Close-ratio five-speed
Final Drive	#520 chain; 13T/48T
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	120/80-19
Seat Height	37.6 inches
Ground Clearance	13.2 inches
Front Suspension	12.2 inches travel
Rear Suspension	Pro-Link Showa single shock with spring preload, rebound and compression damping adjustability; 12.4 inches travel
Rake	27° 04'
Trail	4.6 inches
Wheelbase	58.3 inches
Curb Weight	249 pounds