If you have to undertake adjustments on your Rieju RR 2000 then it is usually a great idea to own a Workshop Manual to use as personal reference just in case you need to know how to remove a certain component much like the Clutch and match it again efficiently.
Rieju RR 2000 Workshop Manuals are able to offer targeted diagnostic guides for your car so if something is wrong it helps you find out what the problem is and some ways to correct it. You can then determine if this can be done yourself or if ever the job is simply too big you can actually book your RR 2000 in with a trusted car garage.
Rieju RR 2000 manual