If you need to do maintenance on your own Jincheng GX 125 SR then it is usually recommended to have access to a Workshop Manual to keep just for reference in the event you want to know the right way to strip off a certain component much like the Clutch and fit it again in the right way.
Jincheng GX 125 SR Workshop Manuals are able to offer precise diagnostic info on your vehicle so if something is not working it will help you ascertain what the situation is and ways to make it better. You will be able to decide if you can do this yourself or in case the job is simply too big you are able to make a reservation for your GX 125 SR in with a suitable car garage.
Jincheng GX 125 SR manual