If you choose to accomplish maintenance on your Yamaha TZR50 then it is always recommended to own a Workshop Manual for reference in case that you need to know easy methods to remove a certain component for example Brake Pads and fit it again in the right way.
Yamaha TZR50 Workshop Manuals offers you certain diagnostic guidelines for your car or truck therefore if something is wrong it helps you find out what the problem is and tips on how to make it better. You will be able to evaluate if you can do this yourself or that the job is simply too big you could make a reservation for your TZR50 in to a suitable friendly mechanic.
Yamaha TZR50 manual