If you choose to conduct maintenance tasks on your own Hyosung GF 125 E then it will always be a good plan to own a Workshop Manual for personal reference if perhaps you want to know the way to take off a certain component much like the Wheel Bearing and fit it again in the correct way.
Hyosung GF 125 E Workshop Manuals offers you detailed diagnostic information for the car or truck therefore if something is playing up it will help you figure out what the situation is and how you can repair it. You will be able to analyse if you can do this yourself or that the job is too big you could book your GF 125 E right into a nearby garage.
Hyosung GF 125 E manual