Engine Inspection and Maintenance
Table of tightening torque for fastening parts used in Engine
Fastening position and part name
Tightening torque（N·m）
Cylinder cap nut M8
Cylinder cap nut M6
Cylinder cap bolt
Cylinder block connecting bend bolt
Cylinder block connecting nut
Flywheel locknut
Valve clearance adjuster
Gearshift changeover contact screw
Closing bolt
Right side cover bolt
Front left cover bolt
Coil screw
Clutch separating disc bolt
Clutch locknut
Filter screen cover bolt
Tensioner pinch bolt
Drive gear locknut
Drive sprocket bolt
Engine oil pump screw
Ratchet upper and lower baffler screw
Spark plug
25～28
8～12
8～12
8～12
8～12
50～55
10～15
8～12
8～12
8～12
8～12
8～12
6～8
45～50
8～12
8～12
50～60
18～22
8～12
8～12
18～22
Components that cannot be reused:
Please be sure to use new paper pad, sealing ring, O ring, cotter pin, circlip, retainer and so on while
installing or assembling components.
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