Yamaha ’09 YZF-R1 Kit Manual page 76

Tightening the Cylinder Head
Tightening the Cylinder Head (Turn-of-Nut Method)
1. Tighten the bolts in the tightening sequence of 1 to 10 to a snug torque of 25N•m
(2.5kgf•m).
2. Retighten the bolts in the tightening sequence of 1 to 2 to a turn-of-nut angle of 145°±5°.
3. Retighten the bolts in the tightening sequence of 3 to 7 to a turn-of-nut angle of 135°±5°.
4. Retighten the bolts in the tightening sequence of 8 and 9 to a turn-of-nut angle of 160°±5°.
5. Retighten the bolts in the tightening sequence of 10 to a turn-of-nut angle of 135°±5°.
TIP
The numbers 1 to 10 show the sequence in which the bolts are tightened.
Apply engine oil to the bolt threads, contact surfaces, and washers.
These numbers indicate the tightening sequence.
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