Yamaha YZ450F Owner's Service Manual page 43

CHASSIS
△ - marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened
Upper bracket and outer tube
△
Lower bracket and outer tube
△
Upper bracket and steering stem
△
Handlebar upper holder
△
Handlebar lower holder
△
Steering ring nut
△
Front fork and damper assembly
Front fork and adjuster
Damper assembly and base valve
Adjuster and damper assembly
Bleed screw (front fork) and base valve
Front fork and front fork protector
△
Front fork protector and brake hose holder
△
Throttle grip cap
Clutch lever holder
Clutch lever mounting nut
Clutch lever position lock nut
Front brake master cylinder and bracket
△
Front brake master cylinder cap
Brake lever mounting bolt
Brake lever mounting nut
Brake lever position locknut
Cable guide (front brake hose) and under bracket
△
Front brake hose union bolt (brake master cylinder)
△
Front brake hose union bolt (brake caliper)
△
Front brake caliper and front fork
△
Brake caliper (front and rear) and pad pin plug
Brake caliper (front and rear) and pad pin
△
Brake caliper (front and rear) and bleed screw
△
Front wheel axle and axle nut
△
Front wheel axle holder
△
Front brake disc and wheel hub
△
Rear brake disc and wheel hub
△
Footrest bracket and frame
△
Brake pedal mounting
△
Brake pedal position locknut
Rear brake master cylinder and frame
△
Rear brake master cylinder cap
Rear brake hose union bolt (brake caliper)
△
Rear brake hose union bolt (brake master cylinder)
△
Rear wheel axle and axle nut
△
TIGHTENING TORQUES
Thread size Q'ty
M8 × 1.25
M8 × 1.25
M24 × 1.0
M8 × 1.25
M10 × 1.25
M28 × 1.0
M51 × 1.5
M22 × 1.25
M42 × 1.5
M12 × 1.25
M5 × 0.8
M6 × 1.0
M6 × 1.0
M5 × 0.8
M6 × 1.0
M6 × 1.0
M5 × 0.8
M6 × 1.0
M4 × 0.7
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M10 × 1.25
M10 × 1.25
M8 × 1.25
M10 × 1.0
M10 × 1.0
M8 × 1.25
M16 × 1.5
M8 × 1.25
M6 × 1.0
M6 × 1.0
M10 × 1.25
M8 × 1.25
M6 × 1.0
M6 × 1.0
M4 × 0.7
M10 × 1.25
M10 × 1.25
M22 × 1.5
2-13
Tightening torque
Nm m•kg
4 21 2.1
4 21 2.1
1 145 14.5
4 28 2.8
2 34 3.4
1 Refer to TIP.
2 30 3.0
2 55 5.5
2 29 2.9
2 29 2.9
2 1 0.1
6 5 0.5
2 8 0.8
2 4 0.4
2 5 0.5
1 4 0.4
1 5 0.5
2 9 0.9
2 2 0.2
1 6 0.6
1 6 0.6
1 5 0.5
1 4 0.4
1 30 3.0
1 30 3.0
2 28 2.8
2 2 0.2
2 18 1.8
2 6 0.6
1 105 10.5
4 21 2.1
6 12 1.2
6 14 1.4
4 55 5.5
1 26 2.6
1 6 0.6
2 10 1.0
2 2 0.2
1 30 3.0
1 30 3.0
1 135 13.5
ft•lb
15
15
105
20
24
22
40
21
21
0.7
3.6
5.8
2.9
3.6
2.9
3.6
6.5
1.4
4.3
4.3
3.6
2.9
22
22
20
1.4
13
4.3
75
15
8.7
10
40
19
4.3
7.2
1.4
22
22
98