If you want to conduct maintenance on your own Hyosung GT650S then it is always a good idea to have access to a Workshop Manual to use as a guide just in case you need to know how to take off a certain part for example the Dashboard and install it again accurately.
Hyosung GT650S Workshop Manuals provide you with certain diagnostic facts on your car so if something is playing up it will help you figure out what the situation is and how to repair it. You can then assess if this can be done yourself or if ever the job is just too big you are able to book your GT650S right into a suitable mechanic.
Hyosung GT650S manual