HYOSUNG Aquil GV650, Service Manual

Page: 71 / 222

ENGINE 3-28
▣
Oversize oil ring
The following two types of oversize oil ring are used.
They bear the following identification marks.
Color classification
Painted red
Painted yellow
Oversize oil ring
0.5 mm
1.0 mm
2nd
05
10
1st
05
10
Oversize piston ring
0.5 mm
1.0 mm
◉ OVERSIZE RINGS
▣
Oversize piston ring
The following two types of oversize piston ring are used.
They bear the following identification numbers.
◉
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
20.006~20.014 mm
(0.7876~0.7880 in)
Service limit
20.040 mm
(0.7890 in)
Conrod small
end I.D.
◉ CONROD DEFLECTION INSPEC-
TION
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
Service limit
3.0mm (0.12 in)
Dial calipers : 09900-20605
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304