If you need to undertake maintenance on your own Jincheng Custom 50 then it is always a good plan to have access to a Workshop Manual to use as a guide in case you want to know how you can take out a certain part like the Clutch and fit it again the right way.
Jincheng Custom 50 Workshop Manuals gives you detailed diagnostic guidelines for the vehicle so if something is playing up it will help you figure out what the problem is and ways to make it better. You can then evaluate if you can do this on your own or if ever the job is just too big you could make a booking for your Custom 50 in to a decent car garage.
Jincheng Custom 50 manual