6. 4-STROKE: CYLINDER HEAD/VALVES VITALITY 50 Install the camshaft dowel pins and holder. · Apply engine oil to the threads of the cylinder head nuts. · Diagonally tighten the cylinder head nuts in 23 times. · Position the camshaft holder "EX" mark on the exhaust valve side. Torque: Cam shaft hold nut: 1.21.6kgf-m Apply engine oil to threads Nuts/Washers 2. Press the tensioner key to release it. · Check one-way cam operaiton (tensioner) for unsmooth operation. If necessary replace the tensioner. Tensioner Key Spring Tensioner Cap Install tensioner to cylinder and gasket. Install two bolts and tighten it. Install spring and tensioner cap, then tighten the tensioner cap. 3. Adjust the valve clearance. (Refer to the "VALVE CLEARANCE" section in the chapter 3) Bolts 6-9