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a
b
CYLINDER HEAD AND CYLINDER
11. Measure:
S Outside diameter (piston pin) a
12. Measure:
S Piston pin-to-piston clearance
Piston pin-to-piston clearance =
13. Inspect:
S Reed valves 1
14. Measure:
S Valve stopper height a
15. Measure:
S Reed valve bending limit a
5-10
Out of specification ! Replace the piston
pin.
Outside diameter (piston pin) a :
19.995 X 20.000 mm
(0.7872 X 0.7874 in)
Out of specification ! Replace the piston.
Bore size (piston pin) b –
Outside diameter (piston pin) a
Piston pin-to-piston clearance =
0.004 X 0.0065 mm
(0.00016 X 0.00026 in)
Bends/cracks/damage ! Replace.
Out of specification ! Replace the valve
stopper.
Valve stopper height a :
9.5 X 9.9 mm (0.37 X 0.39 in)
Out of specification ! Replace the reed
valve.
Reed valve bending limit a :
less than 0.6 mm (0.023 in)
ENG
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