Yamaha YZ450F(B) 2012 Owner's Service Manual page 41

TIGHTENING TORQUES
ENGINE
△ - marked portion shall be checked for torque tightening after break-in or before each race.
Item
Spark plug
Camshaft cap
Cylinder head blind plug screw
Oil passage plug
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 stopper plate (exhaust
side)
Exhaust pipe (nut)
Exhaust pipe and frame
Silencer
△
Silencer clamp (front)
Silencer clamp (rear)
Starter knob/Idle screw
Throttle body joint
Throttle body joint clamp
Air filter case
△
Air filter joint and air filter case
Air filter case cover
Air filter joint clamp
Throttle cable adjust bolt and locknut
Throttle cable (pull)
Throttle cable (return)
Throttle cable cover
Air duct
Radiator
Radiator hose clamp
Radiator pipe 1
Radiator pipe 2
Impeller
Water pump housing cover
Coolant drain bolt
Oil pump cover
Oil pump
Oil pump drive gear shaft
Thread
Q'ty
size
M10S 1
M6 8
M12 2
M8 1
M6 3
M10 4
M6 2
M6 3
M6 1
M6 2
M6 1
M6 2
M6 3
M8 1
M8 2
M8 1
M8 1
M12 1
M6 2
M5 1
M6 3
M4 9
M5 2
M4 1
M6 1
M10 1
M10 1
M5 2
M6 3
M6 4
M6 8
M6 1
M6 1
M8 1
M6 4
M6 1
M4 1
M6 2
M6 1
2-11
TIGHTENING TORQUES
Tightening torque
13 Nm (1.3 m•kg, 9.4 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
28 Nm (2.8 m•kg, 20 ft•lb)
15 Nm (1.5 m•kg, 11 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
*1
Refer to TIP.
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
20 Nm (2.0 m•kg, 14 ft•lb)
30 Nm (3.0 m•kg, 22 ft•lb)
12 Nm (1.2 m•kg, 8.7 ft•lb)
16 Nm (1.6 m•kg, 11 ft•lb)
2 Nm (0.2 m•kg, 1.4 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
3 Nm (0.3 m•kg, 2.2 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
1 Nm (0.1 m•kg, 0.7 ft•lb)
5 Nm (0.5 m•kg, 3.6 ft•lb)
4 Nm (0.4 m•kg, 2.9 ft•lb)
4 Nm (0.4 m•kg, 2.9 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
4 Nm (0.4 m•kg, 2.9 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
2 Nm (0.2 m•kg, 1.4 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
14 Nm (1.4 m•kg, 10 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
2 Nm (0.2 m•kg, 1.4 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
Remarks