If you choose to carry out fixes on your own Hyosung GV 650 Cruiser then it is always recommended to own a Workshop Manual to use as reference in case you need to know tips to take out a certain part for example the Brake Discs and install it again in the correct way.
Hyosung GV 650 Cruiser Workshop Manuals are able to offer specific diagnostic guidelines with regards to your vehicle therefore if something is playing up it can help you work out what the problem is and some ways to fix it. You will be able to evaluate if this can be achieved yourself or if ever the job is simply too big you could book your GV 650 Cruiser in to a decent mechanic.
Hyosung GV 650 Cruiser manual