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English - Yamaha-Racingparts

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Tightening the Cylinder Head<br />

Tightening the Cylinder Head (Turn-of-Nut Method)<br />

1. Tighten the bolts in the tightening sequence of 1 to 10 to a snug torque of 25N•m<br />

(2.5kgf•m).<br />

2. Retighten the bolts in the tightening sequence of 1 to 2 to a turn-of-nut angle of 145°±5°.<br />

3. Retighten the bolts in the tightening sequence of 3 to 7 to a turn-of-nut angle of 135°±5°.<br />

4. Retighten the bolts in the tightening sequence of 8 and 9 to a turn-of-nut angle of 160°±5°.<br />

5. Retighten the bolts in the tightening sequence of 10 to a turn-of-nut angle of 135°±5°.<br />

TIP<br />

The numbers 1 to 10 show the sequence in which the bolts are tightened.<br />

Apply engine oil to the bolt threads, contact surfaces, and washers.<br />

These numbers indicate the tightening sequence.<br />

– 81 –

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