Yamaha WR450F(R) Owner's Service Manual page 622

SWINGARM
13. Install:
Bolt [chain tensioner (lower)] 1
G
Plain washer 2
G
Collar 3
G
Chain tensioner 4
G
Nut [chain tensioner (lower)] 5
G
14. Install:
Chain support 1
G
Support cover 2
G
Bolt {chain support [r= 50 mm (1.97 in)]}
G
3
Nut (chain support) 4
G
Bolt {support cover [r= 10 mm (0.39 in)]}
G
5
5 - 59
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)