Honda CRF450X 2017 Owner's Manual & Competition Handbook page 143

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.
(9)
(5) throttle valve
(8) fl oating valve
(9) hole
138
Adjustments for Competition
17 CRF450X̲31MEY710.indb 138 17 CRF450X̲31MEY710.indb 138
6. Remove the accelerator pump cover screws
(10) and accelerator pump cover (11).
(10)
(5)
(8)
(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).
(12)
(14)
(15)
(11) accelerator pump cover
(12) U-ring
(13) O-ring
8. Remove the holder screw (17), throttle stop
(16) fl oat bowl
(17) holder screw
(18) throttle stop screw holder
(19) fl oat bowl screws
(20) tube guides
9. Remove the pump rod (21).
(16)
(13)
(12)
(11)
(14) spring
(15) diaphragm
(22)
(16) fl oat bowl
(21) pump rod
(22) rod passage
(23) link lever
screw holder (18), float bowl screws (19),
tube guides (20) and float bowl (16).
(19) (17)
(18)
(20)
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.
(23)
(21)
(23)
(16)
(21)
2016/06/08 11:46:22 2016/06/08 11:46:22