Ducati MULTISTRADA 1200S ABS 2015 Workshop Manual page 623

Now it is possible to slide out clutch pushrod (7).
Check the condition of the two O-rings (8) and replace them if necessary.
Refitting the clutch slave cylinder
If the clutch pushrod (7) must be replaced, it is necessary to replace also the two O-rings (8).
Lubricate with the indicated product and reposition the clutch pushrod (7) with the two O-rings (8).