6. 4-STROKE: CYLINDER HEAD/VALVES VITALITY 50 Inspect the rocker arm bore, cam lobe Rocker Arm Bore contact surface and adjuster surface for wear/pitting/scratches/blue discoloration. If any defects are found, replace the rocker arm shaft with a new one, then inspect lubrication system. Contact Surface Adjuster Surface Measure each rocker arm shaft O.D. Measure the I.D. of each valve rocker arm. Measure arm to shaft clearance. Replace as a set if out of specification. Service limits: 0.10mm CAMSHAFT HOLDER ASSEMBLY Reverse the "CAMSHAFT HOLDER DISASSEMBLY" procedures. Align the cross cutout on the exhaust valve rocker arm shaft with the bolt of the camshaft holder. 6-7