2-6 PERIODIC MAINTENANCE
Remove the valve inspection caps
3.
NOTE:
Valve clearance is to be checked when the engine is cold.
The intake and exhaust valves must be checked and adjusted
when the piston is at Top-Dead-Center (TDC) on the compres-
sion stroke.
Turn the crankshaft until the TDC line
4 on the generator
rotor aligns with the index mark
5 on the crankcase.
Insert the thickness gauge between the valve stem end and
adjusting screw on the rocker arm to check the clearance.
If the clearance is out of specification, bring it into the speci-
fied range.
% Valve clearance (when cold)
IN: 0.03 0 .08 mm (0.001 0. 003 in)
EX: 0.08 0 .13 mm (0.003 0. 005 in)
$ 09900-20803: Thickness gauge or
09900-20804: Thickness gauge
"
# Valve clearance adjuster locknut:
14 N•m (1.4 kgf-m, 10.0 lb-ft)
Install the spark plug, valve timing inspection plug and gener-
ator cover cap to the specified torque of each.
# Spark plug: 18 N•m (1.8 kgf-m, 13.0 lb-ft)
Valve timing inspection plug:
23 N•m (2.3 kgf-m, 16.5 lb-ft)
Generator cover cap: 15 N•m (1.5 kgf-m, 11.0 lb-ft)
Securely tighten the locknut after completing adjust-
ment.
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