2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 111Get this manual
FUEL SYSTEM Turn the throttle stop screw to align the butterfly th rott le valve wit the edge of the outside by-pass hole in the carburetor body, if the thrott le stop screw was removed
Install he co ll ar and carburetor heater with the stepped side of the co ll ar facing the carburetor and lighten it