Honda CRF450X 2006 Service Manual

(
ENGINE REMOVAL / INSTALLATION
SERVICE INFORMATION
GENERAL
• During engine r emoval and Ins tallat ion, support the motorcycle using a workstand or equivalent.
• The following components requi re engine removal for service.
-
Crankcase (page 13 · lO) /C rankshaft (page 1 3- 14)fTransmission (page 13-1 1)
- Oil pump (page 5-7)
• The following components can be serviced with the engine installed in the frame.
- Cylinder head (page 9-24)Nalves (page 9-27)
-
Cylinder (page 10-5)/PiSlon (page 10- 6)
- Clutch (page 11 -7)/Kickstarter ( page' '-15)/Gearshift linkage (page 1' -2 4)
- Carburetor(page6-11j
- Secondary air supply system ('O S and '06 Californ ia type, After '06: page 6-31)
- Flywheel (page 12-5)
- Water pump (page 7-9)
- Balan
ce r (page 13-8)
- Starter
clutch (page 11-19)
- Starter
motor (page 19-6)
SPECIFICATIONS
equ;val,nt motor
service classification: SG or Higher
T903 standard: MA
TORQUE VALUES
Engine hanger plate bolt
Engine mounting nut
Drive sprocket bolt
Kickstarter pedal bolt
Swingarm pivot nut
Exhaust pipe joint nut
( front )
(uppe r)
(lower)
SAE 10W-30
equivalent motor oil
API
service classi ficatio n: SG or Hi gher
JASO T903 standard: MA
26 N·m (2.7 kgf ·m, 19 Ibf.ft)
54 N·m (5.5 kgf ·m, 40 Ibf.ft)
54 N ·m (5.5 kgf ·m, 40 Ibf.ft)
54 N·m (5.5 kgf ·m, 40 IbUt)
31 N·m (3.2 kgf ·m, 23 IbUt)
38 N·m (3.9 kgf ·m, 28 Ibf·h)
88 N·m (9.0 kgf · m, 65 Ibf·h)
21 N·m (2.1 kgf · m, 15 Ibf ·h)
U·
nut
0'
8-3

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