Honda CRF450X 2008 Service Manual

MAINTENANCE
ENGINE IDLE SPEED
• Inspect and adjust the idle speed after all other
engine adjustments are within specifications .
• The engine must be warm for an accurate idle
inspection and adjustment. Ten
minutes of stop
and
go riding is sufficient.
Warm up the engine, shift the transmission into
neutral, and hold the motorcycle upright.
Connect a tachometer according to its manufac-
turer's instructions.
Turn the
throttle stop screw to obtain the specified
idle speed.
IDLE SPEED: 1.700 ± 100 rpm
TRANSMISSION OIL
4-22
OIL LEVEL INSPECTION
1. Start the engine and let it idle for 3 minutes.
2. Stop the engine and wait 3 minutes .
3. Support the motorcycle up r ight on a level sur-
face.
4. Remove the oil filler cap, oil check bolt and seat-
ing washer from the right crankcase cover. A
small amount of oil should flow out of the check
bolt hole.
5. If no oil flows out of the check bolt hole, add rec-
ommended transmission oi l slowly through the
oil filler hole unti l oil starts to flow out of the
check bolt hole. Install the oil check bo lt with the
sea l ing washer and filler cap.
6. Repeat steps 1 - 5.
7. After checking the oi l level or adding oil, install f~~;;~ ;~ ~
the oil check bolt with a new sealing washer.
Tighten the oil check bolt
to the specified torque.
TORQUE:
10 N'm (1.0 kgf·m, 7 [bf.ft)
Install and tighten the oil filler cap securely.
•
•

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