2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 102Get this manual
FUEL SYSTEM Install the throttle valve into the carburetor body, aligning its cutout with the throttle stop screw
Tighten the carburetor top securelyInstall the air cleaner housing (page 6-5)Aher installing the carburetor, check the following:throttle grip freeplay (page 4-6)engine idle speed (page 15)choke cable freeplay (page 4-7)pilot screw if new pilot screw is installed (page 6-15)