Honda CRF450R 2012 Service Manual

HYDRAULIC BRAKE
If air enters the
bleeder from
around r he bi8ed
valve threads, seal
The threads wI Th
reflon t ape.
Do not release r he
lever Of pedal until
the bleed valve has
been closed.
16-8
Operate the brake bleeder and loosen the bleed
valve. If an automatic refill system is not used, add
fluid when the fluid level in the reservoir is low.
Perform the bleeding procedure until the system is
completely flushed/bled.
Close the bleed valve and operate the brake lever or
pedal.
If
it still feels spongy, bleed the system again.
If a brake bleeder is not available, perform the fol-
lowing procedure.
Connect a clear bleed hose to the bleed valve.
Pressurize the system with the lever or pedal until
there are no air bubbles in the fluid flowing out of
the small hole in the reservoir and lever or pedal
resistance is felt.
,. Pump the brake lever or pedal several times,
then squeeze the brake
lever or pedal all the way
and loosen the bleed valve 112 of a turn .
Wait several seconds and
dose the bleed valve.
2. Re lease the brake lever or pedal slowly and wait
several seconds after it reaches the end of its
travel.
3. Repeat steps 1-2 until there are no air bubbles in
the
bleed hose.
After bleeding air completely , tighten the bleed
valves to the specified torque.
TORQUE: 5.4 N'm (0 .6 kgf ·m, 4.0 Ibf.ft)
REAR CALIPER

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