If you want to do repairs to your Hyosung GV125C then it will always be recommended to have access to a Workshop Manual for personal reference in case you want to know methods to take out a particular component for example Brake Discs and fit it again in the correct way.
Hyosung GV125C Workshop Manuals will give you exact diagnostic wisdom for your car so if something is faulty it helps you identify what the problem is and how you can fix it. Then you are able to analyse if you can do this on your own or if ever the job is just too big you are able to book your GV125C right into a nearby garage.
Hyosung GV125C manual