Honda CRF450X 2006 Service Manual

,.
Route t he ho s es
properly ('05 - '07:
page 1- 25, After
'07: page 1-3 2 J.
REPLACEMENT/AIR BLEEDING
Remove the right and center engine guard (page 3-5),
Remove the radiator cap .
Drain the cool ant from the system by removing the
drain bolt and sealing washer on the water pump
cover.
Install the drain bolt with a new sealing washer.
Tighten
the drain bolt securely.
Disconnect the siphon hose from the reserve tank.
Remove
the reserve tank cap and reserve tank.
Drain the reserve tank coolant.
Empty the coolant and rinse the inside of the
reserve tank with wate r.
Reinstall the reserve tank and connect the radiator
siphon hose.
Install the right and center engine guard (page 3-5),
Fill the system with the recommended coolant
through the filler opening up to the filler neck.
CAPACITY :
1.21 liter (1.28 US qt , 1.06 Imp qt) at change
Lean the machine approximate ly 20
Q
to the right
and left several times to bleed any air trapped in the
coo l ing system . If the coolant level drops, add more
coolant and repeat the air bleeding procedure.
COOLING SYSTEM
7-7

Honda CRF450X 2006 Specifications

General

Displacement	449 cc
Bore x Stroke	96.0 mm x 62.1 mm
Compression Ratio	12.0:1
Transmission	5-speed
Final Drive	#520 chain; 13T/51T
Front Brake	Single 240 mm disc with twin-piston caliper
Rear Brake	Single 240 mm disc
Front Tire	80/100-21
Rear Tire	110/100-18
Wheelbase	58.3 inches
Engine Type	Liquid-cooled single-cylinder four-stroke
Fuel System	Keihin 40mm flat-slide carburetor
Valve Train	Unicam, 4-valve
Induction	Keihin 40 mm flat-slide carburetor with Throttle Position Sensor (TPS)
Ignition	CD with electronic advance
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment separated into low-speed (13 positions) and high-speed (3.5 turns); 12.4 inches travel