Carburetor Removal - Honda 2009 CRF450X Owner's Manual & Competition Handbook

Carburetor Adjustment & Tuning Tips

Carburetor Removal

1. Turn the fuel valve OFF.
2. Raise the rear wheel off the ground by placing
an optional workstand or equivalent under the
engine.
3. Remove the seat and fuel tank (pages 35, 36).
4. Remove the muffler (page 62).
5. Lift the subframe to the upright position (page 38).
6. Drain the remaining fuel in the float bowl by
loosening the carburetor drain screw (1).
WARNING
Petrol is highly flammable and explosive.
You can be burned or seriously injured
when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Drain the carburetor into an approved petrol container
and dispose of it in an approved manner (page 151).
NOTICE
Improper disposal of drained fluids is harmful to
the environment.
(1)
(1) carburetor drain screw
136
Adjustments for Competition
HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200 HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
7. Tighten the carburetor drain screw.
8. Remove the shock absorber upper mounting
nut (2) and bolt (3).
(3)
(2)
(2) shock absorber upper mounting nut
(3) shock absorber upper mounting bolt
9. Disconnect the throttle position sensor
connector (4).
(4)
(4) throttle position sensor connector
10.Loosen the insulator band screw (5) and
remove the carburetor (6) from the insulator (7).
(6)
(7)
(5)
(5) insulator band screw (7) insulator
(6) carburetor
11.Loosen the hot start cable nut (8) and remove
the hot start valve (9) from the carburetor.
(8)
(9)
(8) hot start cable nut
(9) hot start valve