6. CYLINDER HEAD/VALVES GRAND DINK 125/150 Camshaft Holder CAMSHAFT HOLDER INSPECTION Inspect the camshaft holder, valve rocker arms and rocker arm shafts for wear or damage. If the valve rocker arm contact surface is worn, check each cam lobe for wear or damage. Rocker Arm Shafts Measure the I.D. of each valve rocker arm. Service Limits: IN: 10.10mm replace if over EX: 10.10mm replace if over Measure each rocker arm shaft O.D. Service Limits: IN: 9.90mm replace if below EX: 9.90mm replace if below Intake Manifold CYLINDER HEAD REMOVAL First drain the coolant from the radiator and water jacket, then remove the thermostat water hose. Remove the camshaft. ( 6-4) Remove the carburetor and intake manifold. Remove the bolt attaching the thermostat housing and the thermostat housing. Remove the cylinder head. Bolt Cylinder Head Gasket Remove the dowel pins and cylinder head gasket. Remove the cam chain guide. Remove all gasket material from the cylinder head mating surface. Be careful not to drop any gasket material into the engine. Cylinder Cam Chain Tensioner Slipper 6-6