If you wish to perform fixes on your own Hyosung SD 50 M then it is always a good idea to own a Workshop Manual to use as personal reference if perhaps you want to know the best way to strip off a certain part for example Exhaust and fit it again accordingly.
Hyosung SD 50 M Workshop Manuals can offer you unique diagnostic information for the vehicle so if something is not working it can help you work out what the issue is and how to correct it. You can then decide if you can do this on your own or in case the job is simply too big you can actually make a reservation for your SD 50 M in with a suitable mechanic.
Hyosung SD 50 M manual