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 FREE END GAP
INSPECTION
Before installing piston rings, measure the free end gap
of each ring using vernier calipers. If the gap is less than
the service limit, replace the ring.
PISTON PIN DIAMETER INSPECTION
Using a micrometer, measure the piston pin outside
diameter at three position, both the ends and the center.
If any of the measurements is founds less than the ser-
vice limit, replace the pin.
Piston pin hole
bore
Service limit
15.030 mm (0.5917 in) 13.030 mm (0.513 in)
Piston pin
diameter
Service limit
14.980 mm(0.5898 in) 13.980 mm(0.550 in)
Piston ring free
end gap
Standard
7.2 mm (0.284 in)
5.8 mm (0.228 in)
5.0 mm (0.197 in)
6.0 mm (0.236 in)
1st
2nd
Piston ring free
end gap
Service limit
5.7 mm (0.224 in)
4.6 mm (0.181 in)
4.0 mm (0.158 in)
4.8 mm (0.189 in)
1st
2nd
Dial calipers : 09900-20605
PISTON PIN HOLE BORE
Using a dial calipers, measure the piston pin hole bore
both in the vertical and horizontal directions.
If the measurement exceeds the service limit, replace
the piston.
Micrometer(0~25 mm) : 09900-20201
Vernier calipers : 09900-20101
Piston ring end gap
(Assembly condition)
Standard
0.20~0.32 mm
(0.008~0.013 in)
0.20~0.32 mm
(0.008~0.013 in)
0.10~0.25 mm
(0.004~0.010 in)
0.25~0.40 mm
(0.010~0.016 in)
ENGINE 3-24
2nd
1st
Summary of Contents for 2002 Comet 125
Page 1: ...SERVICE MANUAL 99000 94710 SERVICE MANUAL HYOSUNG MOTORS MACHINERY INC ...
Page 5: ...NOTE Difference between photographs and actual motorcycles depends on the markets ...
Page 13: ...EXTERIOR ILLUSTRATION 1 7 GENERAL INFORMATION ...
Page 96: ...CARBURETOR FUEL SYSTEM 4 4 ...
Page 118: ...LAMP HEADLAMP TURN SIGNAL LAMP TAIL BRAKE LAMP Front Rear ELECTRICAL SYSTEM 5 16 ...
Page 138: ...FRONT FORK CHASSIS 6 14 ...
Page 144: ...FRONT FORK CHASSIS 6 20 ...
