If you wish to do adjustments on your own Ducati Monster S 4 then it is always a good idea to have a Workshop Manual for personal reference should you want to know the right way to take off a certain component much like the Brake Discs and install it again properly.
Ducati Monster S 4 Workshop Manuals offers you specific diagnostic info for the vehicle therefore if something is broken it helps you work out what the issue is and ways to make it better. You can then decide if this can be done on your own or in case the job is too big you can actually make a booking for your Monster S 4 right into a local repair garage.
Ducati Monster S 4 manual