If you wish to execute auto repairs on your own Ducati 851 SP 4 then it is usually a great idea to have a Workshop Manual to use as personal reference in the event that you need to know ways to take off a certain component for example the Exhaust and match it again efficiently.
Ducati 851 SP 4 Workshop Manuals can provide specified diagnostic facts on your vehicle so if something is faulty it will help you identify what the situation is and how you can make it better. You can then determine if you can do this on your own or that the job is simply too big you can actually make a reservation for your 851 SP 4 in to a local garage.
Ducati 851 SP 4 manual