Honda CRF450X 2008 Service Manual

CRANKCASE/CRANKSHAFT /TRANSMISSION/BALANCER
Drive in new
bearings squarely
with
the markmg
side facing TOward
the inside of the
crankcase .
Remove the mains haft bearing, and balancer shaft
bearing using the special tools as shown .
TOOLS:
Mainshaft bearing:
Bearing remover se t 17 mm 07936·3710300
Re mover handle 07936·3710100
Remover weight
Balancer s haft bea ring :
07741-0010201 or
07936 ·37102OA
(U.S.A. only)
Bearing remover set 20 mm 07936-3710600
Remover handle 07936-3710100
Remover weight 07741·0010201 or
07936·371020A
(U.S.A. only)
Remove the countershaft bearing and shift drum
bearing.
Drive
new bearings into the left crankcase using the "" """"::;:-;;:'"
special tools.
TOOLS:
Countershaft bearing:
Driver
Attachment , 52 )( 55 mm
Mains haft bearing:
Driver
Attachment , 31 )( 40 mm
Pilot, 11 mm
Balancer shaft bearing:
Driver
Attachment , 32 )( 35 mm
Pilot, 20 mm
Shift drum bearing:
Driver
Attachment , 31 )( 40 mm
01749 - 0010000
01746-0010400
01149 - 0010000
01746 - 0010200
01746 - 0040400
07749 - 0010000
01746-0010100
01746-0040500
07749 - 0010000
01746 - 0010200
Ahar installing 8 Install the snap ring into the l eft crankcase sec urely .
snap ring. always
rotate it in its
groove ro be sure it
is fully seared.
13-19

Honda CRF450X 2008 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
Transmission	5-speed
Final Drive	#520 chain; 13T/51T
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	110/100-18
Wheelbase	58.3 inches
Seat Height	37.6 inches
Fuel Capacity	1.9 gallons
Induction	Keihin 40mm carburetor
Ignition	CD with electronic advance
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment; 12.4 inches travel
Trail	4.6 inches