Ch. 12 CRANKCASE/CRANKSHAFT
12-2
General Information
Operational precautions
This Section concerns disassembly of the crankcase for repair purpose.
Remove following components before disassembling crankcase.
－Engine remove Section 5
－Cylinder head Section 6
－Cylinder and piston Section 7
－Drive face and driven pulley Section 8
－AC generator/Start one way clutch Section 10
• In case it requires replacing the crankshaft bearing，the driving chain of engine oil
pump or the timing chain， it is preferably to replace crankshaft as a unit.
Specification Unit: mm
Item Standard Limit
Connecting rod side clearance of the big end 0.100~0.400 0.600
Vertical clearance of the big end of the connecting rod 0~0.008 0.050
Crankshaft
Run-out - 0.100
Torque value
Bolts for crankcase 0.8-1.2kgf-m
Engine oil drain bolt 3.5-4.5kgf-m
Cylinder stud bolt 1.0-1.4kgf-m
Tools
Special tools
Crankcase Main Bearing Install Tool: SYM-9100100-REA
Trouble Diagnosis
Engine noise
Loose crankshaft bearing
Loose crankshaft pin bearing
Worn out piston pin and pin hole
To Next Page
Loading...
