Yamaha YZ450F Owner's Service Manual page 42

Part to be tightened
Crankshaft end accessing screw
Timing mark accessing screw
Clutch cover
Right crankcase cover
Left crankcase cover
Crankcase
Clutch cable holder
Oil drain bolt
Oil drain bolt
Oil check bolt (crankcase)
Oil strainer
Oil nozzle
Crankcase bearing stopper
Crankcase bearing stopper (crankshaft)
Drive axle oil seal stopper
Kick shaft ratchet wheel guide
Kickstarter crank
Screw (kickstarter crank)
Primary drive gear
Clutch boss
Clutch cable locknut
Clutch cable adjust bolt and locknut
Clutch spring
Balancer
Balancer shaft driven gear
Balancer weight
Drive sprocket
Drive chain sprocket cover
Shift pedal
Shift guide
Stopper lever
Segment
*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 150° in the proper tightening sequence.
TIGHTENING TORQUES
Thread size Q'ty
M36 × 1.5
M14 × 1.5
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
M8 × 1.25
M6 × 1.0
M6 × 1.0
M5 × 0.8
M6 × 1.0
M8 × 1.25
M6 × 1.0
M6 × 1.0
M8 × 1.25
M6 × 1.0
M20 × 1.0
M20 × 1.0
M8 × 1.25
M6 × 0.75
M6 × 1.0
M10 × 1.0
M14 × 1.0
M6 × 1.0
M20 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
2-12
Tightening torque
Nm m•kg
1 10 1.0
1 6 0.6
7 10 1.0
9 10 1.0
8 10 1.0
13 12 1.2
2 10 1.0
1 20 2.0
1 20 2.0
1 10 1.0
1 10 1.0
1 8 0.8
8 10 1.0
4 22 2.2
2 10 1.0
2 12 1.2
1 33 3.3
1 7 0.7
1 100 10.0
1 75 7.5
1 7 0.7
1 4 0.4
6 10 1.0
1 45 4.5
1 50 5.0
3 10 1.0
1 75 7.5
2 7 0.7
1 12 1.2
2 10 1.0
1 10 1.0
1 30 3.0
ft•lb
7.2
4.3
7.2
7.2
7.2
8.7
7.2
14
14
7.2
7.2
5.8
7.2
16
7.2
8.7
24
5.1
72
54
5.1
2.9
7.2
32
36
7.2
54
5.1
8.7
7.2
7.2
22