HYOSUNG COMET 125 Service Manual page 62

3-25 ENGINE
Piston ring end gap(Assembly condition)
1st
2nd
Thickness gauge : 0990-20806
PISTON RING-TO-GROOVE CLEAR-
ANCE INSPECTION
Remove carbon deposit both from the piston ring and its
groove.
Fit the piston ring into the groove. With the ring com-
pressed and lifted up, measure the clearance on the
bottom side of the ring using a thickness gauge.
Piston ring-groove clearance
1st
2nd
Piston ring-groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Thickness gauge : 09900-20806
Micrometer(0~25 mm) : 09900-20201
OVERSIZE RINGS
Oversize piston ring
The following two types of oversize piston ring are used.
They bear the following identification numbers.
Oversize piston ring
0.5 mm
1.0 mm
Oversize oil ring
The following two types of oversize oil ring are used.
They bear the following identification marks.
Oversize oil ring
0.5 mm
1.0 mm
Service limit
0.5 mm (0.02 in)
0.5 mm (0.02 in)
Service limit
0.180 mm (0.007 in)
0.150 mm (0.006 in)
Standard
1.01~1.03 mm
(0.040~0.041 in)
1.01~1.03 mm
(0.040~0.041 in)
2.01~2.03 mm
(0.079~0.080 in)
Standard
0.970~0.990 mm
(0.0382~0.0390 in)
0.970~0.990 mm
(0.0382~0.0390 in)
1st 2nd
05 05
10 10
Color classification
Painted red
Painted yellow