If you have to conduct auto repairs for your Hyosung SD 50 then it is usually recommended to own a Workshop Manual to use as reference in case that you need to know techniques to take out a particular component such as the Clutch and fit it again safely.
Hyosung SD 50 Workshop Manuals will provide you with certain diagnostic guidelines for the car therefore if something is not working it helps you ascertain what the issue is and some ways to correct it. You can then evaluate if this can be achieved by yourself or if the job is simply too big you are able to make a reservation for your SD 50 in to a local repair garage.
Hyosung SD 50 manual