PERIODIC MAINTENANCE
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PERIODIC CHECKS AND ADJUSTMENTS
3.
Pull the recoil starter slowly, and then set the piston at
TDC (top-dead-center) on the compression stroke.
Check the piston position by inserting a screw driver into
the spark plug hole.
4.
Measure:
• Valve clearance
(Between the rocker arm and valve stem end)
Out of specification Adjust.
Valve clearance must be measured when the engine has
cooled down enough to be touched.
Thickness gauge:
90890-03268
Feeler gauge set:
YU-26900-9
Valve clearance (cold):
Intake: 0.05–0.09 mm (0.0020–0.0035 in)
Exhaust: 0.05–0.09 mm (0.0020–0.0035 in)