Ducati MULTISTRADA 1200S Owner's Manual page 361

Warning
Correct tightening of swinging arm screws (1) is
critical to rider and passenger safety.
Important
Improper chain tension will lead to early wear of
transmission parts.
To reach screws (1) it is necessary to remove the
gravel guard (2) and rear chain guard (3), and loosen
the three screws (4).
360
Fig. 263
3
2
Fig. 264
2
3