Honda HRG416C1 Manual page 70

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PISTON RING END GAP
Before inspection, check whether the cylinder sleeve
I.D. is within the specification.
Put the piston ring [1] in the cylinder and then use the
piston crown to push the ring down.
This will make the piston ring horizontal so the ring end
gap can be measured.
Measure each piston ring end gap using a feeler gauge.
STANDARD:
Top:
Second:
Oil (side rail):
SERVICE LIMIT:
Top/Second/oil: 1.0 mm (0.04 in)
If any of the measurements is more than the service
limit, replace the piston rings (top, second, oil) as a set
(page 10-10).
PISTON PIN O.D.
Measure and record the piston pin O.D. at three points
(both ends and middle). Take the minimum reading to
determine piston pin O.D.
STANDARD:
SERVICE LIMIT: 12.954 mm (0.5100 in)
If the measurement is less than the service limit,
replace the piston pin (page 10-10).
PISTON PIN BORE I.D.
Measure and record the piston pin bore I.D.
STANDARD:
SERVICE LIMIT: 13.048 mm (0.5137 in)
If the measurement is more than the service limit,
replace the piston (page 10-10).
0.20 – 0.30 mm
(0.008 – 0.012 in)
0.30 – 0.40 mm
(0.012 – 0.016 in)
0.20 – 0.45 mm
(0.008 – 0.018 in)
12.994 – 13.000 mm
(0.5116 – 0.5118 in)
13.002 – 13.016 mm
(0.5119 – 0.5124 in)
CRANKSHAFT/PISTON/VALVES
[1]
10-15