Yamaha YZ450F Manuel D'atelier Du Proprietaire page 556

SWINGARM
13. Install:
• Bolt [chain tensioner (lower)] 1
• Plain washer 2
• Collar 3
• Chain tensioner 4
• Nut [chain tensioner (lower)] 5
14. Install:
• Chain support 1
• Support cover 2
• Bolt {chain support [ = 50 mm (1.97 in)]}
3
• Nut (chain support) 4
• Bolt {support cover [ = 10 mm (0.39 in)]}
5
5 - 60
CHAS
20 Nm (2.0 m · kg, 14 ft · lb)
7 Nm (0.7 m · kg, 5.1 ft · lb)
7 Nm (0.7 m · kg, 5.1 ft · lb)