HYOSUNG 2010 ST7 Service Manual page 77

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
DIAMETER 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.
Standard
Conrod small
20.006~20.014 mm
end I.D.
(0.7876~0.7880 in)
Dial calipers : 09900-20605
CONROD DEFLECTION
INSPECTION
Move the small end sideways while holding the big end
immovable in thrust direction.
Measure the amount of deflection.
Turn the conrod and see if it moves smoothly without
play and noise. This method can check the extent of
wear on the parts of the conrod s big end.
Conrod deflection
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304
1st 2nd
05 05
10 10
Color classification
Painted red
Painted yellow
Service limit
20.040 mm
(0.7890 in)
Service limit
3.0 mm (0.12 in)
ENGINE 3-30