If you need to do repairs for your Ducati 851 SP 4 then it is usually a good idea to have access to a Workshop Manual for personal reference should you want to know simple methods to strip off a certain component like the Wheel Bearing and fit it again successfully.
Ducati 851 SP 4 Workshop Manuals offer you exact diagnostic guides for the vehicle so if something is broken it will help you figure out what the situation is and methods to fix it. You will be able to determine if you can do this on your own or if ever the job is simply too big you are able to make a reservation for your 851 SP 4 in with a decent garage.
Ducati 851 SP 4 manual