Yamaha YZ450F(V), Owner'S Service Manual

Page: 83 / 650

SPEC
2 - 12
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.
Crankcase cover (right) M6
×
1.0 8 10 1.0 7.2
M6
×
1.0 2 12 1.2 8.7
Crankcase cover (left) M6
×
1.0 8 10 1.0 7.2
Crankcase M6
×
1.0 12 12 1.2 8.7
Clutch cable holder M6
×
1.0 2 10 1.0 7.2
Oil drain bolt (crankcase right) M10
×
1.25 1 20 2.0 14
(crankcase left) M8
×
1.25 1 20 2.0 14
Oil check bolt (crankcase) M6
×
1.0 1 10 1.0 7.2
Oil strainer M6
×
1.0 1 10 1.0 7.2
Crankcase bearing stopper M6
×
1.0 4 14 1.4 10
Crankcase bearing stopper M6
×
1.0 8 10 1.0 7.2
Drive axle oil seal stopper M6
×
1.0 2 10 1.0 7.2
Ratchet wheel guide M6
×
1.0 2 12 1.2 8.7
Kick starter M8
×
1.25 1 33 3.3 24
Screw (kick starter) M6
×
1.0 1 7 0.7 5.1
Primary drive gear M20
×
1.0 1 110 11.0 80
Clutch boss M20
×
1.0 1 75 7.5 54
Clutch cable adjust bolt and locknut M6
×
0.75 1 4 0.4 2.9
Clutch spring M6
×
1.0 6 10 1.0 7.2
Balancer M10
×
1.0 1 45 4.5 32
Balancer driven gear M14
×
1.0 1 50 5.0 36
Balancer weight plate M6
×
1.0 3 10 1.0 7.2
Drive sprocket M20
×
1.0 1 75 7.5 54
Drive sprocket cover M6
×
1.0 2 8 0.8 5.8
Shift pedal M6
×
1.0 1 12 1.2 8.7
Shift guide M6
×
1.0 2 10 1.0 7.2
Stopper lever M6
×
1.0 1 10 1.0 7.2
Segment M8
×
1.25 1 30 3.0 22
Part to be tightened Thread size Q’ty
Tightening torque
Nm m·kg ft·lb
MAINTENANCE SPECIFICATIONS