Honda CRF450R User Manual

Carburetor Adjustments & Tuning Tips
124 Adjustments for Competition
5. Remove the accelerator pump cover screws
(10) and accelerator pump cover (11).
(10) accelerator pump cover screws
(11) accelerator pump cover
6. Remove the O-rings (12), spring (13) and
diaphragm (14).
Clean the diaphragm.
(12) O-rings (14) diaphragm
(13) spring
7. Remove the holder screw (15), throttle stop
screw holder (16), float bowl screws (17),
tube guides (18) and float bowl (19).
(15) holder screw
(16) throttle stop screw holder
(17) float bowl screws
(18) tube guides
(19) float bowl
8. Remove the pump rod (20).
Clean the pump rod and rod passage (21).
Install the pump rod into the link lever (22).
Push the rod forcibly into the link lever until
it snaps into place.
(20) pump rod (22) link lever
(21) rod passage
(23) float level
(24) float level gauge
(25) carburetor intake
9. Measure the float level (23) with the float
level gauge (24) during float tab just
contacting the float valve and the carburetor
intake (25) facing up. The float level should
be 0.31 in (8.0 mm).
Adjust the float level by bending the float tab
carefully.
(19) float bowl (26) leak jet
(10)
(11)
(10)
(17) (15) (17)
(16)
(18) (17) (18)
(19)
(25)
(24)
(23)
(19)
(26)
10. Remove the leak jet (26) from the float bowl
(19).
Clean the leak jet.
(12)
(13)
(14)
(12)
(21)
(22)
(20)
(22)
(21)

Honda CRF450R Specifications

General

Brand	Honda
Model	CRF450R
Category	Motorcycle
Language	English