Yamaha YFA1S Assembly Manual page 39

NOTE:
®
Apply locking agent (LOCTITE ) to nuts threads.
1. Tighten the nut (inside) to 55 Nm (5.5 m · kg, 40 ft · lb) while holding the rear axle.
2. Hold the nut (inside) and tighten the nut (outside) to 190 Nm (19.0 m · kg, 140 ft · lb).
3. Hold the nut (outside) and tighten back the nut (inside) to 240 Nm (24.0 m · kg, 170 ft · lb).
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