Honda CRF450X 2005 User Manual

(
'-.
7. Turn the pi lot screw in or out sl ow ly to ob tain the
highest engine speed.
8. Ligh tly open the t hr ottle 2 or 3 times, then adj ust
the idle speed with the throttle stop scr ew.
9. Turn the pilot screw in until the engine speed
drops by 50 rpm.
I O. T urn the pilot screw counterclockwise to the final
opening from the position obtain ed in step 9.
FINAL OPENING: 112 turns out
l1.Remove the plug from the vacuum hose, then
disconnec t the vacuum pump and con nect the
vacuum hose to the PAIR control valve.
12.Readjust the idle speed with the throttle stop
screw .
IDLE SPEED : 1,700 ± 100 rpm
Disconnect the tachometer .
SECONDARY AIR SUPPLY SYSTEM ('05
and '06 California type, After '06)
SYSTEM INSPECTION
Warm up the engine to normal operating tempera·
ture.
Check
that the secondary air intake port is clean and
VACUUM
PUMP
free of carbon deposits. t t~jjj ~
Check the pulse secondary air injection (PAIR) con-
trol valve.
FUEL SYSTEM
PAIR CONTROL VALVE
AIRSUPPLY
HOSE
PAIR AIR
I HOSE
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Honda CRF450X 2005 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
Valve Train	Unicam, four-valve
Transmission	Wide-ratio five-speed
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
Ignition	Solid-state CD with electronic advance
Final Drive	520 O-ring-sealed chain
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
Induction	Keihin 40mm flat-slide carburetor