If you choose to accomplish fixes on your Jinlun JL 250 T then it is usually recommended to own a Workshop Manual to use as personal reference if perhaps you want to know techniques to remove a specific component like the Brake Discs and install it again properly.
Jinlun JL 250 T Workshop Manuals can offer you distinct diagnostic wisdom on your car therefore if something is wrong it can help you find out what the problem is and ways to correct it. You can then evaluate if you can do this yourself or if the job is just too big you could book your JL 250 T into a suitable friendly mechanic.
Jinlun JL 250 T manual