2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 121Get this manual
FUEL SYSTEM AIR CUT-OFF VALVE (U type only) Remove the screw and the air cut-off valve from the carburetor bodyRemove the slow air jet and three O-ringsCheck the air cut-off valve and jet for damageClean the air jet with cleaning solvent and blow open with compressed airSLOW AIR JET
AIR CUT-OFF VALVE
VACUUM CHAMBER
Remove the four screws and clamps while holding the vacuum chamber coverWIRE CLAMP SMALL HOSE CLAMP