If you want to execute maintenance tasks for your Hyosung RX 125 SM then it will always be a good plan to have a Workshop Manual to keep just for a guide should you need to know the right way to strip off a certain part much like the Drive Shaft and install it again the right way.
Hyosung RX 125 SM Workshop Manuals gives you precise diagnostic facts on your car or truck so if something is faulty it helps you find out what the situation is and tips to repair it. You will be able to decide if you can do this on your own or if the job is too big you can actually make a booking for your RX 125 SM in to a nearby friendly mechanic.
Hyosung RX 125 SM manual