Honda PC50 Owner's Manual page 37

The inspection and adjustments from following section require ex­
perience and special tools to perform, therefore, it is recommended that
they be accomplished by your Honda service shop for best result.
• VALVE TAPPET CLEARANCE AND ADJUSTMENT
(1) Remove the valve tappet cover and flywheel cover.
(2) Rotate the flywheel counterclockwise until the "T " mark (2) on tha.
flywheel is aligned with the timing index mark © on the left crankcase.'^
(3) In this position, the piston may either be in the compression or the
exhaust stroke.
end of the compression stroke when both the inlet and exhaust valves
are closed.
If the tappets are free, it is cn indication that the valves are closed
and that the piston is on compression.
the valvesare heid in the open position, turn the flywheel 360° and
realign the " T " mark to the timing index mark.
of both inlet and exhaust valves by inserting the 0.05 mm (0.002 in)
thickness gauge between the rocker arm and the valve stem.
The adjustment must be made with the piston at the
This condition can be determined by checking the tappets.
If the tappets are tight and
Check the clearances
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