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TIGHTENING TORQUES
ENGINE
△ - marked portion shall be checked for torque tightening after break-in or before each race.
*1: Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb) in the proper tightening sequence, remove and retighten
the cylinder head bolts to 20 Nm (2.0 m•kg, 14 ft•lb) in the proper tightening sequence, and then tighten the cylinder head
bolts further to reach the specified angle 180° in the proper tightening sequence.
Part to be tightened
Spark plug
Camshaft cap
Cylinder head blind plug screw
Cylinder head (stud bolt)
Cylinder head (bolt)
Cylinder head (bolt)
Cylinder head cover
Cylinder
Timing chain tensioner
Timing chain tensioner cap bolt
Timing chain guide (intake side)
Exhaust pipe (nut)
Exhaust pipe (bolt)
Silencer
△
Silencer clamp
Exhaust pipe protector
Spark arrester
Silencer cap
Air induction pipe
Air cut-off valve assembly and bracket
Bracket (air cut-off valve) and frame
Carburetor joint
Carburetor joint clamp
Air filter case
△
Air filter joint clamp
Air filter joint and air filter case
Throttle cable adjust bolt and locknut
Throttle cable (pull)
Throttle cable (return)
Throttle cable cover
Hot starter plunger
Hot starter cable adjust bolt and locknut
Air filter element
Radiator stay
Radiator
Radiator hose clamp
TIGHTENING TORQUES
Thread size
Q'ty
M10S × 1.0
M6 × 1.0
M12 × 1.0
M8 × 1.25
M10 × 1.25
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
M8 × 1.25
M8 × 1.25
M8 × 1.25
M6 × 1.0
M5 × 0.8
M5 × 0.8
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M4 × 0.7
M6 × 1.0
M6 × 1.0
M5 × 0.8
M6 × 0.75
M6 × 1.0
M12 × 1.0
M5 × 0.8
M12 × 1.0
M6 × 0.75
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
2-12
Tightening torque
Nm
m•kg
1
13
1.3
10
10
1.0
1
28
2.8
1
15
1.5
4
Refer to TIP.*1
2
10
1.0
2
10
1.0
1
10
1.0
2
10
1.0
1
7
0.7
2
10
1.0
1
20
2.0
1
20
2.0
2
30
3.0
1
16
1.6
3
10
1.0
4
7
0.7
6
5
0.5
2
10
1.0
2
10
1.0
2
7
0.7
3
10
1.0
1
3
0.3
2
8
0.8
1
3
0.3
1
4
0.4
1
4
0.4
1
4
0.4
1
11
1.1
2
4
0.4
1
2
0.2
1
4
0.4
1
2
0.2
6
7
0.7
4
10
1.0
8
2
0.2
ft•lb
9.4
7.2
20
11
7.2
7.2
7.2
7.2
5.1
7.2
14
14
22
11
7.2
5.1
3.6
7.2
7.2
5.1
7.2
2.2
5.8
2.2
2.9
2.9
2.9
8.0
2.9
1.4
2.9
1.4
5.1
7.2
1.4
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