If you want to carry out fixes for your Hyosung TN 125 then it is usually a good idea to have a Workshop Manual to use as a guide in case that you need to know methods to strip off a certain part for example, the Dashboard and fit it again adequately.
Hyosung TN 125 Workshop Manuals will provide you with specific diagnostic wisdom for your vehicle so if something is playing up it can help you work out what the issue is and easy methods to correct it. You will be able to assess if this can be achieved on your own or if ever the job is simply too big you could book your TN 125 into a suitable repair garage.
Hyosung TN 125 manual