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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