Piston Ring End Gap Inspection - HYOSUNG RT125D Service Manual

ENGINE
3-15

PISTON RING END GAP INSPECTION

Insert the piston ring squarely into the cylinder using the
piston head.
Measure the end gap with a thickness gauge.
If the gap exceeds the service limit, replace the piston
ring.
Piston ring end gap(Assembling condition)
1st
2nd
Piston ring end gap(Assembling condition)
1st
2nd
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
Standard
0.20~0.32 mm (0.0079 0.0126 in)
0.20~0.32 mm (0.0079 0.0126 in)
Service limit
0.50 mm (0.0197 in)
0.50mm (0.0197 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