Honda 2007 CRF250R, Owner'S Manual

Page: 127 / 165

Carburetor Adjustments & Tuning Tips
122
Adjustments for Competition
5. Remove the accelerator pump cover screws
(11) and accelerator pump cover (12).
(11) accelerator pump cover screws
(12) accelerator pump cover
6. Remove the U-ring (13), O-ring (14), spring
(15) and diaphragm (16).
Clean the diaphragm.
When installing the U-ring into the accelerator
pump cover (12) make sure the U-rings
flatside faces down, away from the float bowl
(17).
(12) accelerator pump cover (15) spring
(13) U-ring (16) diaphragm
(14) O-ring (17) float bowl
7. Remove the holder screw (18), throttle stop
screw holder (19), float bowl screws (20),
tube guides (21) and float bowl (17).
(17) float bowl
(18) holder screw
(19) throttle stop screw holder
(20) float bowl screws
(21) tube guides
8. Remove the pump rod (22).
Clean the pump rod and rod passage (23).
Install the pump rod into the link lever (24).
Push the rod forcibly into the link lever until
it snaps into place.
(22) pump rod (24) link lever
(23) rod passage
(25) float level
(26) float level gauge
(27) carburetor intake
10.Remove the leak jet (28) from the float bowl
(17). Clean the leak jet.
9. Measure the float level (25) with the float
level gauge (26) while the float tab is just
contacting the float valve and the carburetor
intake (27) is facing up. The float level should
be 0.24 in (6.0 mm).
If the float level is out of specification adjust
it by bending the float tab carefully.
(17) float bowl (28) leak jet
(12)
(11)
(12)
(13)
(17)
(12)
(13)
(15) (14)
(16)
(20) (18)
(19)
(17)
(21)
(24)
(22)
(24)
(22)
(23)
(25)
(26)
(27)
(28)
(17)
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