If you wish to perform auto repairs on your Ducati SS 900 Supersport then it is usually a good plan to own a Workshop Manual to use as reference in the event that you want to know techniques to strip off a particular part for instance the Brake Discs and install it again successfully.
Ducati SS 900 Supersport Workshop Manuals offer you specific diagnostic guidelines for the vehicle so if something is playing up it helps you ascertain what the situation is and tips on how to repair it. You can then evaluate if this can be achieved on your own or if the job is just too big you can actually book your SS 900 Supersport in with a nearby repair garage.
Ducati SS 900 Supersport manual