Honda CRF450R 2006 User Manual

Carburetor Adjustments & Tuning Tips
122 Adjustments for Competition
4. Disconnect the fuel line (2) from the fuel
valve (3).
5. Remove the fuel tank (page 30).
6. Remove the subframe (page 32).
7. Loosen the insulator band screw (4).
(2) fuel line
(3) fuel valve
(4) insulator band screw
8. Disconnect the throttle position sensor
connector (5).
9. Remove the carburetor.
(5) throttle position sensor connector
10. Remove the hot start cable holder (6).
(6) hot start cable holder
11. Remove the throttle drum cover bolt (7) and
throttle drum cover (8).
(7) throttle drum cover bolt
(8) throttle drum cover
12. Remove the throttle cables (9) by loosening
the throttle cable lock nut (10).
(9) throttle cables
(10) throttle cable lock nut
(3)
(2)
(4)
(5)
(6)
(7)
(8)
(10)
(9)

Honda CRF450R 2006 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
Induction	Keihin 40mm flat-slide carburetor with throttle position sensor (TPS)
Transmission	Close-ratio five-speed
Final Drive	#520 chain; 13T/48T
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 inches
Seat Height	37.6 inches
Ground Clearance	13.4 inches
Fuel Capacity	1.9 gallons
Ignition	CDI
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