Ducati MONSTER 1100 S Owner's Manual page 74

Unbolt the retaining bolt (H).
Release the oil hoses from the clips (G).
Unbolt the two retaining bolts (9) and release the cover (8).
Withdraw the breather hose (10) from the cover (8).
Withdraw the hose (10) upwards, leaving it attached to the
tank breather and drain hose unions.
8
H
G
10
E
9
fig. 67
10
fig. 68
73