If you wish to do maintenance on your own Linhai Monarch 250 then it is usually a good plan to have a Workshop Manual to use as a reference in the event that you need to know tips on how to strip off a particular component like the Brake Discs and install it again appropriately.
Linhai Monarch 250 Workshop Manuals will give you particular diagnostic info for your vehicle therefore if something is faulty it helps you work out what the situation is and how you can resolve it. You can then analyse if you can do this on your own or in case the job is too big you can still make a reservation for your Monarch 250 into a suitable friendly mechanic.
Linhai Monarch 250 manual