Carburetor Removal - Honda CRF450X 2017 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 36, 37).
4. Remove the muffler (page 62).
5. Lift the subframe to the upright position (page 39).
6. Drain the remaining fuel in the float bowl by
loosening the carburetor drain screw (1).
WARNING
Gasoline is highly fl ammable and
explosive. You can be burned or seriously
injured when handling fuel.
• Stop the engine and keep heat, sparks
and fl ame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Drain the carburetor into an approved gasoline
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
17 CRF450X̲31MEY710.indb 136 17 CRF450X̲31MEY710.indb 136
7. Tighten the carburetor drain screw.
8. Remove the shock absorber upper mounting
nut (2) and bolt (3).
(2)
(3)
(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).
(5) (7)
(5) insulator band screw
(6) carburetor
(7) insulator
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
(6)
2016/06/08 11:46:21 2016/06/08 11:46:21