Yamaha YZ250F(S) Owner's Service Manual page 566

SWINGARM
13. Install:
Bolt (lower chain tensioner) 1
G
Washer 2
G
Collar 3
G
Lower chain tensioner 4
G
Nut (lower chain tensioner) 5
G
14. Install:
Drive chain support 1
G
Drive chain support cover 2
G
Bolt {drive chain support
G
[r= 50 mm (1.97 in)]} 3
Nut (drive chain support) 4
G
Bolt {drive chain support cover
G
[r= 10 mm (0.39 in)]} 5
5 - 57
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)