Honda WB20XT2 Manual page 120

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WB20XT2•WB30XT2
PISTON RING WIDTH
Measure each piston ring width.
WB20XT2:
STANDARD:
Top:
Second: 0.940 – 0.960 mm (0.0370 – 0.0378 in)
SERVICE LIMIT:
Top:
Second: 0.92 mm (0.036 in)
WB30XT2:
STANDARD:
Top:
Second: 0.940 – 0.960 mm (0.0370 – 0.0378 in)
SERVICE LIMIT:
Top:
Second: 0.92 mm (0.036 in)
If any of the measurements is less than the service limit,
replace the piston rings (top, second, oil) as a set (page
13-5).
PISTON RING END GAP
Before inspection, check whether the cylinder sleeve
I.D. is within the specification (page 13-6).
Measure each piston ring end gap using a feeler gauge.
WB20XT2:
STANDARD:
Top:
Second:
Oil (side rail): 0.2 – 0.7 mm
SERVICE LIMIT:
Top:
Second:
Oil (side rail): 1.0 mm (0.04 in)
WB30XT2:
STANDARD:
Top:
Second:
Oil (side rail): 0.10 – 0.35 mm
SERVICE LIMIT:
Top:
Second:
Oil (side rail): 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 13-5).
0.950 – 0.970 mm (0.0374 – 0.0382 in)
0.93 mm (0.037 in)
0.925 – 0.945 mm (0.0364 – 0.0372 in)
0.905 mm (0.0356 in)
0.200 – 0.350 mm
(0.0079 – 0.0138 in)
0.350 – 0.500 mm
(0.0138 – 0.0197 in)
(0.01 – 0.03 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
0.200 – 0.350 mm
(0.0079 – 0.0138 in)
0.350 – 0.500 mm
(0.0138 – 0.0197 in)
(0.004 – 0.014 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
[1]
CRANKCASE
13-9