2-6 PERIODIC MAINTENANCE
INSPECTION
The valve clearance specification is same for both valves. Valve
clearance adjustment must be checked and adjusted, 1) at the
time of periodic inspection, 2) when the valve mechanism is ser-
viced, and 3) when the camshaft is disturbed by removing it for
servicing.
NOTE:
* The piston must be at (TDC) on the compression stroke in
order to check the valve clearance or to adjust valve clear-
ance.
* The clearance specification is for COLD state.
* To turn the crankshaft for clearance checking, rotate in the nor-
mal running direction. The spark plug should be removed.
• Turn crankshaft to bring the “TDC” line
A on the rotor to the
index mark
B on the generator cover.
• Insert a thickness gauge between the valve stem end and the
adjusting screw on the rocker arm.
If the clearance is out of specification, bring it into the speci-
fied range.
# 09900-20803: Thickness gauge
09917-13210: Valve clearance adjusting driver
$ Valve clearance (when cold):
IN.: 0.08 – 0.13 mm
EX.: 0.13 – 0.18 mm
Adjuster
Lock nut
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