Honda CRF250R 2005 Owner's Manual page 124

Carburetor Adjustments & Tuning Tips
5. Remove the accelerator pump cover screws
(12) and accelerator pump cover (13).
(13)
(12)
(12) accelerator pump cover screws
(13) accelerator pump cover
6. Remove the D-ring (14), O-ring (15) spring
(16) and diaphragm (17).
Clean the diaphragm.
When installing the D-ring into the accelerator
pump cover (13) make sure the D-rings
flatside faces down, away from the float bowl
(18).
(14)
(18)
(16)
(14)
(13)
(17) (15)
(13) accelerator pump cover
(14) D-ring
(15) O-ring
120
Adjustments for Competition
7. Remove the holder screw (19), throttle stop
screw holder (20), float bowl screws (21),
tube guides (22) and float bowl (18).
(21)
(12)
(21)
(22)
(18) float bowl
(19) holder screw
(20) throttle stop screw holder
(21) float bowl screws
(22) tube guides
8. Remove the pump rod (23).
Clean the pump rod and rod passage (24).
Install the pump rod into the link lever (25).
Push the rod forcibly into the link lever until
it snaps into place.
(25)
(16) spring
(17) diaphragm
(18) float bowl (23) pump rod
(24) rod passage
(20) (19)
(24)
(23) (25)
(25) link lever
9. Measure the float level (26) with the float
level gauge (27) during float tab just
contacting the float valve and the carburetor
intake (28) facing up. The float level should
be 0.31 in (8.0 mm).
(21)
Adjust the float level by bending the float tab
carefully.
(18)
(21)
(22)
(28)
(26) float level
(27) float level gauge
(28) carburetor intake
10.Remove the leak jet (29) from the float bowl
(18).
Clean the leak jet.
(18)
(23)
(18) float bowl
(26)
(27)
(29)
(29) leak jet