Honda TRX450R Service Manual page 153

FUEL SYSTEM (After '05)
Blow open all jets with compressed air.
Inspect each jet for clogs, wear or damage and
replace them if necessary.
Check the pilot screw for stepped wear or damage.
Check the spring for fatigue or damage.
Replace them if necessary.
Blow open all carburetor body openings with com-
pressed air.
8-15