If you choose to carry out maintenance tasks to your Ducati Monster S4R then it will always be a good idea to have a Workshop Manual to keep just for a reference in the event that you need to know techniques to remove a specific component for instance the Brake Discs and fit it again effectively.
Ducati Monster S4R Workshop Manuals can offer you specified diagnostic info on your car therefore if something is faulty it can help you find out what the situation is and how to fix it. You will be able to analyse if this can be achieved by yourself or that the job is too big you can still make a reservation for your Monster S4R in with a suitable repair garage.
Ducati Monster S4R manual