Honda CRF450R 2007 Service Manual

COOLING SYSTEM
SERVICE INFORMATION
GENERAL
Removing the radiator cap while the engine is hot can
Always let the and radiator coot
down before
[ NOTICE [
the coolant to spray Qut, seriously scalding you.
the
Using coolant with silicate inhibitors may cause premature wear of water pump seals or bloclcage of radiator passages.
USing tap wafer may cause engine damage.
• Add coolant at the reserve tank. Do not remove the radiator cap except to refill or drain the system.
• All cooling system services can be done wi th the engine in the frame.
• Avoid spilling coolant on painted surfaces.
• After serviC ing the system, check for leaks with a cooling system tester.
SPECIFICATIONS
or an I
antifreeze containing silicate-free
TORQUE VALUE
Water pump impeller
TOOLS
Mechanical seal driver
07945-4150400
12 N-m !1.2 kgf·m, 9Ibf.ft)
Bearing remover set, 12 mm
07936-1660101
not available in U.S.A.
Remover weight
07741 -0010201
or 07936-371020A (U.S.A. only)
7-3

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