If you have to undertake adjustments on your Hyosung RX 125 SM then it is usually a good plan to have access to a Workshop Manual to use as personal reference if you want to know ways to remove a specific component for example the Drive Shaft and match it again in the right way.
Hyosung RX 125 SM Workshop Manuals will provide you with specific diagnostic details on your automobile so if something is faulty it can help you identify what the issue is and methods to make it better. You can then analyse if this can be done yourself or in case the job is simply too big you can still make a booking for your RX 125 SM into a decent mechanic.
Hyosung RX 125 SM manual