Yamaha 2003 YZ450FR Owner's Service Manual page 48

Part to be tightened
Crankcase cover (right)
Crankcase cover (left)
Crankcase
Clutch cable holder
Oil drain bolt (crankcase rear)
(crankcase left)
Oil drain bolt (frame)
Oil strainer (frame)
Crankcase bearing stopper
Drive axle oil seal stopper
Ratchet wheel guide
Stopper plate
Kick starter
Screw (kick starter)
Primary drive gear
Clutch boss
Push lever
Clutch spring
Balancer driven gear
Balancer weight plate
Drive sprocket
Drive sprocket cover
Shift pedal
Shift guide
Stopper lever
Segment
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.
NOTE:
*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.
MAINTENANCE SPECIFICATIONS
Thread size
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M10 × 1.25
M6 × 1.0
M8 × 1.25
M18 × 1.5
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
M6 × 1.0
M20 × 1.0
M20 × 1.0
M6 × 1.0
M6 × 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
SPEC
Tightening torque
Q'ty
Nm m·kg
10 10 1.0
8 10 1.0
12 12 1.2
1 10 1.0
1 20 2.0
1 10 1.0
1 23 2.3
1 90 9.0
15 10 1.0
2 10 1.0
2 12 1.2
2 12 1.2
1 33 3.3
1 7 0.7
1 75 7.5
1 75 7.5
1 10 1.0
6 8 0.8
1 50 5.0
3 10 1.0
1 75 7.5
2 8 0.8
1 12 1.2
2 10 1.0
1 10 1.0
1 30 3.0
ft·lb
7.2
7.2
8.7
7.2
1.4
7.2
17
65
7.2
7.2
8.7
8.7
24
5.1
54
54
7.2
5.8
36
7.2
54
5.8
8.7
7.2
7.2
22