SECTION 3. MAINTENANCE
3-7 Valve Clearance
Valve clearance inspection and
adjustment must be performed with the engine
cold.
1) Remove the cylinder head cover, and pull the
starter grip (until a resistance is clearly felt) to
set the piston at top dead center of the
compression stroke (both valves fully closed).
2) Insert a feeler gauge between the rocker arm
and valve to measure valve clearance.
3) If adjustment is necessary, proceed as follows:
a) Use a clamp to hold the rocker arm pivot
and use a wrench to loosen the pivot lock
nut.
b) Turn the rocker arm pivot to obtain the
specified valve clearance.
c) Retighten the lock nut while using a clamp
to hold the rocker arm pivot.
d) Recheck valve clearance after tightening
the lock nut.
Standard
valve
IN. 0.05±0.02 mm
EX. 0.05±0.02 mm
To increase valve clearance, screw out the pivot
To decrease valve clearance, screw in the pivot
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