3. INSPECTION/ADJUSTMENT VITALITY 50 VALVE CLEARANCE "T" Mark (4-STROKE) · Inspect and adjust valve clearance while the engine is cold (below 35). Remove the met-in box ( 13-5) and center cover. ( 13-6) Remove cylinder head cover. ( 6-4) Turn the A.C. generator flywheel to the top dead center (TDC) on the compression stroke so that the "T" mark on the flywheel aligns with the index mark on the left crankcase cover. Index Mark The time marks on the cam sprocket must be flush with the cylinder head surface and round hole on the cam sprocket must be facing up as shown. If the round hole on the cam sprocket are facing down, turn the crankshaft clockwise one full turn and realign the timing marks with the cylinder head surface so it is facing up. Round Hole Time Marks Insert a thickness gauge between the valve Thickness Gauge stem end and the adjusting screw on the rocker arm. If the clearance is out of specification, bring it into the specified range. Valve Clearance: IN: 0.04mm EX: 0.04mm Loosen the lock nut and adjust by turning the adjusting nut Special Valve Adjuster E036 · Check the valve clearance again after the lock nut is tightened. Valve Adjuster 3-14