2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 127Get this manual
FUEL SYSTEM PRIMER KNOB Install the spring primer knob assembly, and tighten the two screws securelySCREWS
PRIMER KNOB ASSEMBLY
VACUUM CHAMBER
Install new O-ring into the air joint grooveInstall the set plate into the air joint grooveInstall the air joint into the carburetor body, aligning the set plate groove with the lug on the carburetor body, and tighten the screwO-RING SET PLATE SCREW
AIR JOINT Install the needle clip onto the jet needleSTANDARD CLIP POSITION: 2nd groove from top Install the washer onto the jet needle and insert the jet needle into the vacuum pistonInstall the spring into the needle holder and set the needle holder into the vacuum pistonDIAPHRAGMPISTON