1-3 Torque limits
Descriptions
Size
kgf•cm
N•m
in•lbf
Starter
system
Starter pawl
M5*
60 - 100
6 - 10
50 - 90
Starter case
M5
30 - 50
3 - 5
25 - 45
Brake lever side
M5*
70 - 90
7 - 9
60 - 80
Ignition
system
Magneto rotor (Flywheel)
M8
160 - 200
16 - 20
140 - 175
Ignition coil
M5
35 - 50
3.5 - 5
30 - 45
Spark plug
M14
130 - 170
13 - 17
113 - 150
Fuel
system
Carburettor
M5
30 - 40
3 - 4
25 - 35
Intake bellows
M5
75 - 95
7.5 - 9.5
65 - 85
Clutch
Clutch hub
LM10
300 - 400
30 - 40
265 - 350
Cylinder cover
Fan cover side
M6
15 - 25
1.5 - 2.5
13 - 22
Recoil side
M5
15 - 30
1.5 - 3
13 - 25
Engine
Crankcase
M5
†
60 - 90
6 - 9
50 - 80
Cylinder
M5
†
60 - 100
6 - 10
50 - 90
Cylinder cover
M5
60 - 90
6 - 9
50 - 80
Muf
fl
er
M5*
70 - 110
7 - 11
60 - 95
Muf
fl
er plate
M4
15 - 25
1.5 - 2.5
13 - 22
Exhaust gasket
M5
70 - 110
7 - 11
60 - 95
Other
Auto-oiler
M4
30 - 50
3 - 5
25 - 45
Compression spring
Engine
M5
30 - 45
3 - 4.5
25 - 40
Crankcase
M5
60 - 80
6 - 8
50 - 70
Front handle
M5
60 - 90
6 - 9
50 - 80
Front handle
M6
40 - 55
4 - 5.5
35 - 48
M5
40 - 60
4 - 6
35 - 50
Rear handle
M5
40 - 60
4 - 6
35 - 50
Brake lever
M5
60 - 90
6 - 9
50 - 80
Brake cover
M5*
40 - 60
4 - 6
35 - 50
Sprocket guard plate
M4*
15 - 25
1.5 - 2.5
13 - 22
Spring holder
M5
30 - 45
3 - 4.5
25 - 40
Spike
M5
60 - 90
6 - 9
50 - 80
Ignition switch
M10
15 - 30
1.5 - 3
13 - 25
Guide bar
M5
200 - 230
20 - 23
175 - 200
Regular bolt, nut and screw
M3
6 - 10
0.6 - 1
5 - 9
M4
15 - 25
1.5 - 2.5
13 - 22
M5
25 - 45
2.5 - 4.5
22 - 40
M6
45 - 75
4.5 - 7.5
40 - 65
M8
110 - 150
11 - 15
95 - 130
LM: Left-hand thread
*Thread locking sealant (See next page)
†
The torque difference between four bolts should not exceed 20 kgf• cm (2N• m, 17in•lbf) per bolt.
SERVICE INFORMATION
CS-550
4