Service manual

Page 97 of 151

11-2 General Information

Maintenance Notes

• This Section concerns disassembly of the crankcase for repairs.

• Remove following components before disassembling crankcase:

o Engine: Chapter 5

o Cylinder head: Chapter 6

o Cylinder and piston: Chapter 7

o Drive face and driven pulley: Chapter 8

o A/C generator & one way clutch: Chapter 10

• If it becomes necessary to replace the crankshaft bearing, oil pump drive chain, or the

timing chain, it is recommended to replace the whole crankshaft assembly.

Specifications - Crankshaft

Torque value

• Bolts for crankcase: 0.8~1.2kgf-m / 6-9 lbf-ft

• Engine oil drain bolt: 3.5~4.5kgf-m / 25-33 lbf-ft

• Cylinder stud bolt: 1.0~1.4kgf-m / 7-10 lbf-ft

Special tools

• L. crank shaft oil seal driver (27*42*7): SYM-1332100-HMA

11-3 Troubleshooting

Engine noise

• Loose crankshaft bearing

• Loose crankshaft pin bearing

• Worn out piston pin and pin hole

Item

Standard

(mm)

Limit

(mm)

Connecting rod side clearance of the larger end 0.100~0.400 0.600

Vertical clearance of the larger end of the connecting rod 0~0.008 0.050

Run-out 0.030 0.100