If you want to accomplish maintenance tasks for your Hyosung GT650R then it will always be recommended to possess a Workshop Manual to keep just for personal reference just in case you need to know techniques to strip off a certain part like the Dashboard and fit it again correctly.
Hyosung GT650R Workshop Manuals offers you particular diagnostic information for the car or truck therefore if something is not working it will help you understand what the problem is and tips to fix it. You can then assess if this can be achieved by yourself or in case the job is too big you could book your GT650R in to a decent car garage.
Hyosung GT650R manual