2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 142Get this manual
CYLINDER HEADIV ALVECAMSHAFT Install the dowel pins and new gasketPlace the push rods onto the cam followers in the crankcase
Turn the crankshaft counterclockwise and align the mark on the flywheel with the index mark on the crankcase coverMake sure the piston is 8t TDC on the compression stroke (the push rods are lowered)
INDEX MARK
Installmg the head cover Incorrectly WII result In severe engme damage