Yamaha 2001 YZ426F/LC Owner's Service Manual page 444

FRONT WHEEL AND REAR WHEEL
5 - 9
8. Install:
Chain puller (right) 1
Plain washer 2
Nut (wheel axle) 3
NOTE:
Temporarily tighten the nut (wheel axle) at this
point.
9. Adjust:
Drive chain slack a
Drive chain slack:
40 ~ 50 mm (1.6 ~ 2.0 in)
Refer to "DRIVE
ADJUSTMENT" section in the CHAP-
TER 3.
10. Tighten:
Nut (wheel axle) 1
125 Nm (12.5 m · kg, 90 ft · lb)
Locknut 2
CHAS
CHAIN SLACK