7. CYLINDER/PISTON
7-2
PRECAUTIONS IN OPERATION
General Information
z
Both cylinder and piston service can be carried out when engine mounted on frame.
Specification
LA12W & LA15W & LA18W
Item Standard
Limit
ID ( LA18W not included)
56.995~57.015
57.016
Cylinder
Bend -
0.050
Top ring
0.015~0.050
0.090
Clearance between
piston rings
2
nd
ring
0.015~0.050
0.090
Top ring
0.150~0.300
0.500
2
nd
ring
0.300~0.450
0.650
Ring-end gap
Oil ring side rail
0.200~0.700
-
OD of piston ( LA18W not included)
56.985~57.005
56.900
Clearance between piston and cylinder
0.010~0.040
0.100
Piston/
Piston ring
ID of piston pin boss
15.002~15.008
15.040
OD of piston pin
14.960~15.000
14.930
Clearance between piston and piston pin
0.002~0.014
0.020
ID of connecting rod small-end
15.016~15.034
15.060
LA18W
Item Standard
Limit
Cylinder ID
60.995~61.015
61.016
Piston
OD of piston
60.985~61.005
60.900
TROUBLE DIAGNOSIS
Low Or Unstable Compression Pressure
Cylinder or piston ring worn out
Knock or Noise
Cylinder or piston ring worn out
Carbon deposits on cylinder head top side
Thermostat burnt
Smoking in Exhaust Pipe
Piston or piston ring worn out
Piston ring installation improperly
Cylinder or piston damage
Engine Overheat
Carbon deposits on cylinder head top side
Cooling pipe clogged or not enough in coolant
flow
To this chapter contents
Summary of Contents for JOYRIDE 100
Page 1: ...SERVICE MANUAL FORWARD HOW TO USE THIS MANUAL CONTENTS...
Page 21: ...1 GENERAL INFORMATION 1 16 NOTES To this chapter contents...
Page 41: ...3 LUBRICATION SYSTEM 3 8 NOTES To this chapter contents...
Page 81: ...7 CYLINDER PISTON 7 8 NOTES To this chapter contents...
Page 103: ...9 FINAL DRIVING MECHANISM 9 8 NOTES To this chapter contents...
Page 111: ...10 ALTERNATOR STARTING CLUTCH 10 8 NTOES To this chapter contents...
Page 145: ...14 BRAKE 14 2 Rear Disk Brake System 4 5 kgf m 0 55 kgf m 3 5 kgf m To this chapter contents...
Page 153: ...14 BRAKE 14 10 Notes To this chapter contents...
Page 191: ...17 ELECTRICAL SYSTEM 17 20 NOTES To this chapter contents...
Page 196: ...18 SPECIAL TOOLS 18 5 BEARING DRIVER To this chapter contents...
Page 200: ...18 SPECIAL TOOLS 18 9 OUTER BEARING PULLER INNER BEARING PULLER To this chapter contents...
Page 202: ...19 WIRING DIAGRAM 19 1 LA12W LA15W SERIER WIRING DIAGRAM Homepage Contents 19...
Page 203: ...19 WIRING DIAGRAM 19 2 LA18W SERIER WIRING DIAGRAM Homepage Contents...