If you need to undertake fixes for your Rieju RRX 50 then it is always recommended to possess a Workshop Manual to keep just for personal reference in the event that you want to know how you can strip off a specific component for example Brake Discs and install it again safely.
Rieju RRX 50 Workshop Manuals provides special diagnostic info for your automobile therefore if something is not working it can help you work out what the problem is and how to resolve it. You can then assess if this can be done on your own or that the job is too big you can make a reservation for your RRX 50 right into a decent mechanic.
Rieju RRX 50 manual