If you wish to accomplish adjustments to your Hyosung GT 650R then it is usually recommended to have access to a Workshop Manual to keep just for personal reference in case that you need to know methods to remove a specific part for example Door and fit it again adequately.
Hyosung GT 650R Workshop Manuals offers you unique diagnostic guidelines on your car so if something is broken it can help you find out what the issue is and how you can repair it. You will be able to assess if you can do this by yourself or if ever the job is just too big you can still make a booking for your GT 650R into a decent repair garage.
Hyosung GT 650R manual