If you have to perform maintenance on your own Ducati ST4 S then it is usually a great idea to have access to a Workshop Manual to use as personal reference in case that you need to know the right way to take off a certain part for example Drive Shaft and fit it again effectively.
Ducati ST4 S Workshop Manuals offer you certain diagnostic wisdom for your vehicle so if something is wrong it helps you ascertain what the problem is and the way to make it better. You will be able to decide if you can do this yourself or in case the job is too big you can make a booking for your ST4 S in to a local garage.
Ducati ST4 S manual