Honda CRF450X 2009, Owner'S Manual & Competition Handbook

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HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
Carburetor Adjustment & Tuning Tips
When installing the floating valve (8) onto the
throttle valve (5) make sure the floating
valve’s flat side faces out and the hole (9)
faces down.
(5) throttle valve
(8) floating valve
(9) hole
(9)
(5)
(8)
138
Adjustments for Competition
6. Remove the accelerator pump cover screws
(10) and accelerator pump cover (11).
(10) accelerator pump cover screws
(11) accelerator pump cover
7. Remove the U-ring (12), O-ring (13), spring
(14) and diaphragm (15).
Clean the diaphragm.
When installing the U-ring into the accelerator
pump cover (11) make sure the U-ring flat-
side faces down, away from the float bowl (16).
(11) accelerator pump cover (14) spring
(12) U-ring (15) diaphragm
(13) O-ring (16) float bowl
8. Remove the holder screw (17), throttle stop
screw holder (18), float bowl screws (19),
tube guides (20) and float bowl (16).
(16) float bowl
(17) holder screw
(18) throttle stop screw holder
(19) float bowl screws
(20) tube guides
9. Remove the pump rod (21).
Clean the pump rod and rod passage (22).
Install the pump rod by pushing the rod
forcibly into the link lever (23) until it snaps
into place.
(21) pump rod (23) link lever
(22) rod passage
(11)
(10)
(16)
(11)
(12)
(12)
(13)
(15)
(14)
(18)
(16)
(19)
(17)
(20)
(22)
(23)
(21)
(23)
(21)