TIGHTENING TORQUES
ENGINE TIGHTENING TORQUES
2 - 15
TIGHTENING TORQUES
SPEC
SPEC
Part to be tightened
Part name
Thread
size
Q’ty
Tightening torque
Remarks
Nm
m · kg ft · lb
Cylinder head (Muffler pipe)
Stud bolt
M6
2
9
0.9
6.5
Cylinder head (Pipe assy, inlet)
Stud bolt
Cover head cylinder
M6
4
12
1.2 8.7
M6
2
12
1.2 8.7
M6
1
1
0.1
0.7
Nut
M
7
4
15
1.5
11
Holder cam shaft
Spark plug
—
M12
1
55 5.5 40
Flywheel comp
Nut
M12
1
55
5.5 40
Valve adjuster nut hex
Timing chain tensioner(body)
Duct inlet and cover R side
Duct inlet and shroud assy A and B
Shroud assy B and box tensioned lifter
Shroud assy A and crank case, L
Cover L side
Face assy, movable drive
Bolt
Bolt
M6
2
12
1.2 8.7
M6
1
Bolt
Bolt
M6
2
12
1.2 8.7
M6
1
12
1.2 8.7
Bolt
M6
1
12
1.2 8.7
Bolt
M6
8
12
1.2 8.7
Bolt
M6
2
12
1.2 8.7
Nut
M6
1
12
1.2 8.7
Timing chain tensioner(plug)
Bolt
Nut
M5
2
9
0.9
6.5
Nut
Gear oil pump driven
Hole cap tap adjusting Bolt
M30 1 8 0.8 5.8
M8
1 25 2.5 18
M5
2
2
0.2 1.4
M5
2
5
0.5 3.6
Bolt
M6
8
12
1.2 8.7
Bolt
Screw
Screw
Screw
Screw
M3 2 1
0.1
0.7
Carburetor overflow drain screw
Exhaust pipe
Muffler
Crankcase R and L
Carburetor pipe assy, inlet
Air cleaner holder
Air filter
Pivot cam chain set
Stud bolt A
Cylinder
Shroud assy A and B
Bolt
M6
1
2
0.2 1.4
M10
1
40 4.0 30
Outer clutch nut
Nut
Nut
Nut
Motor start comp
Bolt
M6
2
12
1.2 8.7
Stator comp
Pulse
M5
1
5
0.5 3.6
Spark arrester
Bolt
M6
4
12
1.2 8.7
Fan comp cooling
M10 1 11
1.1 8.0
Bolt
M7
2
9
0.9
6.5
Stud bolt B
M7
2
9
0.9
6.5
Cylinder head(timing chain side)
Cover R side
M6
3
12
1.2 8.7
Bolt
Pump assy oil
M6
1
10
1.0 7.2
Bolt
M6
2
10
1.0 7.2
Bolt
Sprocket drive
M6
7
12
1.2 8.7
M6
1
12
1.2 8.7
Bolt
Bolt
M6
3
12
1.2 8.7
Bolt
M6
1
12
1.2 8.7
Bolt
M6
2
12
1.2 8.7
M6
2
13
1.3 9.4
Bolt
Cover mission
M8
1
15
1.5 11
Bolt
Gear oil drain bolt
6
0.6 4.3
Stud bolt
Stud bolt
M6
2
9
0.9 6.5