HYOSUNG Aquila 250 Service Manual page 67

3-29 ENGINE
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
◉ CONROD SMALL END INSIDE DIAM-
ETER INSPECTION
Using a dial calipers, measure the conrod small end
inside diameter both in vertical and horizontal directions.
If any of the measurements exceeds the service limit,
replace the conrod.
Conrod small end
inside diameter
15.006~15.014 mm
Dial calipers : 09900-20605
Standard
1.01~1.03 mm
1.01~1.03 mm
2.01~2.03 mm
Standard
0.970~0.990 mm
0.970~0.990 mm
1st 2nd
05 05
10 10
Color classification
Painted red
Painted yellow
Standard Service limit
15.040 mm