If you have to conduct fixes on your own Suzuki GT 750 then it is always a great idea to have a Workshop Manual to keep just for personal reference if perhaps you need to know the best ways to remove a certain part like the Drive Shaft and install it again accordingly.
Suzuki GT 750 Workshop Manuals are able to offer certain diagnostic information for your car or truck so if something is wrong it can help you identify what the situation is and some ways to resolve it. After that you can assess if this can be done by yourself or in case the job is simply too big you can book your GT 750 in with a trusted car garage.
Suzuki GT 750 manual