Honda CRF450R 2007 Service Manual

CYLINDER HEADIVALVES
CYLINDER HEAD REMOVAL
Remove the following:
- Ignition coil (page 18-8)
- Exhaust pipe (page 3- 1 3)
- Carbur etor (page 6-1 1)
- Camshaft holder assembly ('05 - '07: page 9· 8,
After '07: page 9-1 6)
- Spark plug (page 4-12)
'05 and '06 Remove the PAIR control valve (page 6-30),
california type. Drain the coolant (page 7-7),
After ' 06 :
Be careful not to let Remove the shims.
the shims fall into •
The s him s ca n be easily removed wit h tweezers
the cylinder.
9-24
or a magnet .
• Mark all val ve sh ims so they can be installed in
their origi nal position.
Remove the upper engine moun t ing nut , bolt and ir:' ~~ '1":'
fuel hose clamp. 010';;;;;;;;;';';';;:;;;;' ;;; ;;';"
Remove the bolts, clut ch cable guide and engine
hanger plates.
Loosen the hose band screw and disconnect the
upper radiator hose.
•
•
•

Honda CRF450R 2007 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	5-speed
Final Drive	#520 chain; 13T/48T
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 inches
Seat Height	37.6 inches
Fuel Capacity	1.9 gallons
Induction	Keihin 40mm carburetor
Ignition	CDI
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment
Trail	4.6 inches