If you wish to execute fixes on your Ducati 851 SP 4 then it is usually a good idea to own a Workshop Manual to use as reference if perhaps you want to know techniques to take off a specific component for example, the Gearbox and match it again efficiently.
Ducati 851 SP 4 Workshop Manuals offers clear special diagnostic information for your car therefore if something is playing up it will help you determine what the problem is and easy methods to resolve it. Then you are able to assess if this can be done by yourself or if the job is just too big you are able to make a reservation for your 851 SP 4 into a local garage.
Ducati 851 SP 4 manual