Honda CRF450R 2011 Service Manual

CYLINDER HEADIV ALVES
ASSEMBLY
!11l! STOPPER RING
-,
CAMS H AFT HOLDER
, DECOMPRESSOR
P LU NGER
ROCKER ARM SHAFT
--:?t DECOMPRESSOR SH AFT
, VALVE LIFTER
, CAMSHAFT
---' SNAP RING 'rp
--:?t ROCKER ARM
Apply molybdenum oil solution to the camshaft
journal and lobes.
Install
the camshaft to the camshaft holder.
I NOTICE I
Make sure the intake cam lobes are facing up when
installing the camshaft to prevent damaging the
intake lifter bores.
Make sure the snap Install the snap ring into the groove of the camshaft
rmg;s firmly sealed holder.
in the groove.
9-22
CAMSHAFT ,
CAMSHAFT H OLDER
•

Honda CRF450R 2011 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
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
Trail	114mm (4.5 inches)
Induction	PGM-FI, 46mm throttle body
Front Suspension	48mm inverted with rebound and compression damping adjustability; 12.2 inches travel
Rear Suspension	Pro-Link single shock with rebound and compression damping adjustability; 12.4 inches of travel
Wheelbase	58.7 inches
Seat Height	37.6 inches
Fuel Capacity	1.5 gallons