7. CYLINDER HEAD/VALVES ATV 150/125 Cylinder Head Cover CAMSHAFT REMOVAL Remove seat, front cover, center cover. Front fender, fuel tank and exhaust pipe. Remove the four cylinder head cover bolts to remove the cylinder head cover. Bolts Remove the cam chain tensioner cap bolt and the O-ring. Bolt O-ring Turn the cam chain tensioner screw clockwise to tighten it. Tensioner Screw Turn the flywheel counterclockwise so that Camshaft Gear Round Hole the "T" mark on the flywheel aligns with the index mark on the crankcase to bring the round hole on the camshaft gear facing up to the top dead center on the compression stroke. Punch Marks 7-4