6. CYLINDER HEAD/VALVES GRAND DINK 250 Tensioner Screw Turn the cam chain tension screw counter clockwise to release it. O-ring Apply engine oil to a new O-ring and install it. Tighten the cam chain tension cap screw. Be sure to install the gasket into the groove properly. Cylinder Head Cover CYLINDER HEAD COVER INSTALLATION Adjust the valve clearance. ( 3-6) Install a new cylinder head cover O-ring and install the cylinder head cover. Be sure to install the O-ring into the groove properly. Install and tighten the cylinder head cover bolts. O-ring Torque: 7.811.8N-m 6-11