2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 141Get this manual
CYLINDER HEADIVALVE CAMSHAFT Install the cylinder head cover (page 21) ,
Coat new O-ring with engine oil and install it into the carburetor groove
and cables properly (page 118)
Route the hoses Install the carburetor assembly onto the insulator and tighten the two nuts
Install the ca rburetor drain hose into the hose guideInstall the following:air cleane housing (page 65)exhaust system (page 3-10)heal protector (page 6-19)