If you need to conduct maintenance tasks to your Rieju SMX 125 then it is usually a good plan to own a Workshop Manual to keep just for a guide in case that you need to know the way to take out a certain part including Clutch and fit it again correctly.
Rieju SMX 125 Workshop Manuals provide you with special diagnostic guides for the car so if something is broken it can help you discover what the situation is and methods to resolve it. You will be able to decide if this can be done by yourself or that the job is simply too big you can make a reservation for your SMX 125 into a local repair garage.
Rieju SMX 125 manual