2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 129Get this manual
FUEL SYSTEM AIR CUT-OFF VALVE (U type only) Install new O-rings onto the slow air jet and air cut-off valveInstall the air jet with its small end facing the air cut-off valve
SLOW AIR JET
Install the slow air jet and air cut-off valve onto the carburetor body Install and tighten the screw
AIR CUT-OFF VALVE
CARBURETOR HEATER
Install the collar and carburetor heater with the stepped side of the collar facing the carburetor and tighten carburetor heaterCARBURETOR HEATER