7. CYLINDER HEAD/VALVES ATV 150/125 Camshaft Bearings Check each camshaft bearing for play or damage. Replace the camshaft assembly with a new one if the bearings are noisy or have excessive play. CAMSHAFT HOLDER DISASSEMBLY Rocker Arm Bolt Remove the bolt attaching the stop plate. Take out the valve rocker arm shafts using a 5mm bolt. Remove the valve rocker arms. Rocker Arm Shaft 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. Measure each rocker arm shaft O.D. Measure arm to shaft clearance. Replace as a set if out of specification. Service limits: 0.1 mm (0.004 in) 7-6