Honda TRX450R Service Manual page 132

FUEL SYSTEM {'04 - '05)
Turn the throttle stop screw to align the butterfly
throttle valve with the edge of the outside by-pass
hole in the carburetor.
Install the accelerator pump (page 7-17)
ACCELERATOR PUMP
Install the diaphragm shaft into the float chamber
through the boot while slowly turn it to prevent the
boot from damaging.
Set the diaphragm rib into the groove properly.
Install the spring and accelerator pump cover.
DIAPHRAGM
COVER
SPRING
Install the three screws and tighten them securely
being careful not to pinch the diaphragm.
PUMP COVER
Install the spring washer, plain washer, plastic
washer, accelerator pump link arm and collar, and
tighten the bolt securely if they were removed.
SCREWSJ
i ACCETERATOR PUMP LINK ARM
BOLT, COLLAR AND WASHERS
7-17