If you choose to undertake adjustments to your Hyosung X 125D then it will always be recommended to own a Workshop Manual to keep just for personal reference in the event you want to know the best way to strip off a specific component for instance the Drive Shaft and match it again properly.
Hyosung X 125D Workshop Manuals gives you special diagnostic info with regards to your automobile so if something is faulty it can help you find out what the situation is and the way to resolve it. You will be able to determine if this can be achieved by yourself or if the job is too big you are able to make a booking for your X 125D in to a suitable repair garage.
Hyosung X 125D manual