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2-19
TIGHTENING TORQUES
SPEC
TIGHTENING TORQUES
ENGINE TIGHTENING TORQUES
Item
Fastener
Thread
Q
’
ty
Tightening torque
Remarks
Item
Fastener
size
Qty
Nm mSkg ftSlb
Remarks
Spark plugs
Cylinder head
Camshaft caps
Cylinder head cover
Camshaft cap oil check bolt
Reed valve cover
Air-cut valve stay
Camshaft sprockets
Connecting rod caps
Generator rotor
Timing chain tensioner
Timing chain tensioner cap bolt
Thermostat cover
Coolant hose joint
Water pump cover
Water pump
Radiator and frame
Radiator stay and crankcase
Oil pump cover
Oil pump
Oil pan
Oil pan (center)
Oil cooler
Engine oil drain bolt
Oil filter union bolt
Oil filter
Oil pump chain guide
Oil pipe
Throttle body joint
Air filter case cover
Air filter case and frame
Throttle body and throttle body
joint
Throttle body and air filter case
Exhaust pipe and cylinder head
Exhaust pipe and exhaust pipe
stay
Exhaust pipe and muffler
Exhaust pipe stay and frame
Crankcase (main journal)
Crankcase
Crankcase
Crankcase
–
Nut
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Nut
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
–
Bolt
Bolt
Bolt
Screw
Bolt
Clamp
Clamp
Nut
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
Bolt
M10
M10
M6
M6
M6
M8
M6
M6
M7
M7
M12
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M20
M14
M20
M20
M6
M6
M6
M5
M6
M4
M5
M8
M8
M8
M8
M8
M6
M6
M8
4
10
2
20
6
1
4
1
4
8
1
2
1
2
2
2
2
2
1
3
3
12
1
1
1
1
1
2
2
8
6
1
4
4
8
1
1
1
10
2
13
2
13
1st 19
2nd 50
12
10
12
20
10
10
24
15 + 150_
75
12
7.0
12
10
10
12
7.0
10
12
12
12
12
63
43
70
17
12
12
10
3.0
10
3.0
3.0
20
20
20
34
14
12
24
1.3
1.9
5.0
1.2
1.0
1.2
2.0
1.0
1.0
2.4
1.5 + 150_
7.5
1.2
0.7
1.2
1.0
1.0
1.2
0.7
1.0
1.2
1.2
1.2
1.2
6.3
4.3
7.0
1.7
1.2
1.2
1.0
0.3
1.0
0.3
0.3
2.0
2.0
2.0
3.4
1.4
1.2
2.4
9.4
14
36
8.7
7.2
8.7
15
7.2
7.2
17
11 + 150_
54
8.7
5.1
8.7
7.2
7.2
8.7
5.1
7.2
8.7
8.7
8.7
8.7
46
31
51
12
8.7
8.7
7.2
2.2
7.2
2.2
2.2
15
15
15
25
1.0
8.7
17
Yamaha bond
No.1215
See NOTE 1
See NOTE 2