If you wish to undertake fixes on your own Jinlun JL 250 5 then it is usually recommended to possess a Workshop Manual to keep just for personal reference in the event that you want to know simple methods to remove a certain part for example the Door and fit it again accordingly.
Jinlun JL 250 5 Workshop Manuals can provide special diagnostic details for your vehicle so if something is wrong it helps you figure out what the issue is and methods to fix it. You can then analyse if this can be achieved on your own or in case the job is too big you can book your JL 250 5 in to a decent garage.
Jinlun JL 250 5 manual