Yamaha YZ450F Manuel D'atelier Du Proprietaire page 454

FRONT WHEEL AND REAR WHEEL
5 - 9
9. Adjust:
• Drive chain slack a
Drive chain slack:
48 ~ 58 mm (1.9 ~ 2.3 in)
Refer to "DRIVE
ADJUSTMENT" section in the CHAPTER
3.
10. Tighten:
• Nut (wheel axle) 1
125 Nm (12.5 m · kg, 90 ft · lb)
• Locknut 2
16 Nm (1.6 m · kg, 11 ft · lb)
CHAS
CHAIN SLACK