SPEC
TIGHTENING TORQUES
SPECIFIED TORQUES
Part to tightened
ENGINE
Muffler stay – cylinder body
Muffler – muffler stay 2
Eye – cylinder head
Muffler – eye
Muffler stay 2 – crankcase
Water temperature sensor –
mixing joint
Muffler stay – muffler
joint
Muffler – muffler joint
Muffler – mixing joint
Exhaust chamber joint –
exhaust manifold
Exhaust chamber/stay – bracket
Exhaust chamber stay/
cylinder head – cylinder
Exhaust chamber –
exhaust chamber joint
Engine – engine mount
Exhaust manifold –
cylinder
Water pipe – exhaust manifold
Reed valve plat/reed valve –
crankcase
Reed valve – reed valve base
YPVS cable holder/valve cover –
cylinder
YPVS valve cover – cylinder
YPVS valve arm – shaft
YPVS valve assembly – cylinder
Spark plug – cylinder head
Cylinder head cover/
cylinder head – cylinder
Cylinder – crankcase
TIGHTENING TORQUES
Part name
Bolt
Bolt
Bolt
Nut
Bolt
—
1st
Bolt
2nd
1st
Bolt
2nd
1st
Bolt
2nd
Bolt
Bolt
1st
Bolt
2nd
Bolt
Bolt
1st
Bolt
2nd
1st
Nut
2nd
Bolt
Bolt
Screw
Bolt
Bolt
Bolt
Bolt
Bolt
1st
2nd
Bolt
3rd
1st
Bolt
2nd
Tightening torque
Thread
Q'ty
size
Nm
M10
2
39
M10
1
39
M10
4
39
M10
2
39
M10
2
39
—
1
20
15
M10
2
39
15
M8
6
33
11
M8
6
22
M10
4
39
M10
2
39
15
M8
2
35
M10
6
39
M8
4
17
22
M10
10
39
15
M10
2
39
M6
6
12
M6
18
12
M4
24
1
M6
2
10
M6
10
10
M4
3
3
M5
3
4
M14
3
25
22
M8
22
22
35
22
M10
12
39
2-7
Remarks
m•kgf
ft•lb
3.9
28
3.9
28
3.9
28
3.9
28
3.9
28
2.0
14
1.5
11
3.9
28
1.5
11
3.3
24
1.1
8.0
2.2
16
3.9
28
3.9
28
1.5
11
3.5
25
3.9
28
1.7
12
2.2
16
3.9
28
1.5
11
3.9
28
1.2
8.7
1.2
8.7
0.1
0.7
1.0
7.2
1.0
7.2
0.3
2.2
0.4
2.9
2.5
18
2.2
16
2.2
16
3.5
25
2.2
16
3.9
28
E