Honda CRF450R 2007 Service Manual

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CRANKCASE/ CRANKSHAFT /TRANSMISSION/ BALANCER
Remove the oil pump inner / outer rotors and shaft.
Remove the one-way valve.
Remove the dowel pins and gasket.
TRANSMISSION OISASSEMBL Y
Separate the crankcase halves (page 13-10),
Temporarily install the right crankcase.
Place the right crankcase facing down and separate
the right and left crankcase halves.
Remove the shift fork shafts.
Remove the shift fork guide pins from the shift
drum grooves and remove the shift drum.
Remove the shift forks.
Remove the mains haft and countershaft as an
assembly from the r ight crankcase.
Di sa ss emble th e tr ans mi ss ion:
• Keep track of the disassembled parts (gears,
bushings, washer s, and rings) by sliding them
onto a tool or a piece of wire .
• Do not remove the snap rings over the shafts.
Expand
the snap ring ends and slide the snap
ring off the Shaft, along with the gear behind it .
DOWEL PINS
MAINSHAFT J
COUNTERS
HAFT
ASSEMBLY
13-11

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