Yamaha YFZ 50 2020 Owner's Manual page 104

To check the drive chain slack
1. Place the ATV on a level surface.
2. Move the ATV back and forth to locate the
tightest portion of the drive chain, and then
measure the drive chain slack as shown.
Drive chain slack:
6.0–12.0 mm (0.24–0.47 in)
9
1. Drive chain slack
3. If the drive chain slack is incorrect, adjust it as
follows.
To adjust the drive chain slack
1. Loosen the bolts and nuts.
1
9-27
1
1. Bolt
1. Nut
2. Loosen the rear brake lever free play adjust-
ing nut.
1