1999-2004 Honda TRX400EX FourTrax Service Manual, Page 70Get this manual
FUEL SYSTEM Remove the pilot screw, spring, washer and O-ringCheck each jet for wear or damageCheck the pilot screw for wear or damageClean the jets with cleaning solvent and blow open with compressed airI
CARBURETOR CLEANING
- air cut-off valvethronle valve
- pilot screw
Remove the following:
- accelerator pump
- main iet, needle iet holder, needle jet and slow jet
CAUTION:
Cleaning the air and fuel passages with piece wire will darnacre the carburetor bodyBlow open all air and fuel passages in the carburetor body with compressed air