Ducati MULTISTRADA 1200S ABS 2015 Workshop Manual page 1069

Overhauling the pressure plate
Check bearing (7) conditions: replace the bearing if the play is excessive.
Check the contact surface of the last friction plate; if extremely scored, polish it in the same manner as described
previously for the cylinder head surface (Overhauling the cylinder head components).
Check the condition of the spring guide seats (G) of pusher plate (4) and of snap rings (5).
Overhauling the pusher plate springs
Measure the uncompressed length "L" of each spring (3).
Minimum length: 47.74 mm.
Replace any springs that are shorter than the above limit value.