Yamaha YFZ450S 2003 Service Manual page 41

Part to be tightened
Thermo switch 2
Starter motor
Starter motor lead
Bush holder assembly and rear
bracket nut
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 in two steps of 90° to reach the specified
angle of 180° in the proper tightening sequence.
TIGHTENING TORQUES
Thread
Part name Q'ty
size
— M18
Bolt M6
Nut M6
Nut M6
2 - 18
SPEC
Tightening torque
Nm m · kg ft · lb
1 28 2.8 20
2 10 1.0 7.2
1 7 0.7 5.1
1 7 0.7 5.1
Remarks