2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 131Get this manual
CYLINDER HEADIVAlVECAMSHAFT Align the bolt holes by turning the shaftInstall the bolts with new sealing washers and tighten themInstall the cyl inder head cover (page 8-21)
CYLINDER HEAD REMOVAL
Remove the following:heat protector (page 6- 19jexhaust system (page 3-10)air cleaner housing (page 65) Place an approved fuel container under the drain hoseloosen the drain screw and drain the carburetorRelease the carburetor drain hose from the hose guide on the protector cover