If you want to carry out fixes to your Hyosung GT650R then it will always be a good idea to own a Workshop Manual to use as a guide in the event you need to know techniques to take off a specific component for example the Brake Pads and fit it again appropriately.
Hyosung GT650R Workshop Manuals provides particular diagnostic information for your car or truck so if something is not working it can help you determine what the issue is and tips on how to correct it. Then you are able to determine if you can do this on your own or if the job is simply too big you can still book your GT650R in with a local mechanic.
Hyosung GT650R manual