Ducati MONSTER 821 Workshop Manual page 834

If necessary, disassemble the radiator as described below.
Following the same procedure on both sides, loosen the three screws (1) and remove the left (2) and right
(3) covers.
To remove the front cover (6), loosen screws (8) on both sides of radiator (7) and front screw (4).
834 Ducati Manuals Resource