If you wish to carry out adjustments for your Ducati ST 4 then it will always be a great idea to own a Workshop Manual to use as a guide if perhaps you want to know tips on how to strip off a specific part for instance the Exhaust and match it again in the right way.
Ducati ST 4 Workshop Manuals offers clear certain diagnostic info with regards to your car so if something is faulty it will help you ascertain what the problem is and tips on how to correct it. Then you are able to determine if this can be done yourself or if the job is simply too big you can actually make a reservation for your ST 4 into a suitable mechanic.
Ducati ST 4 manual