If you have to perform adjustments to your Rieju NKD 125 then it will always be recommended to possess a Workshop Manual to use as reference in the event that you need to know tips to strip off a particular component such as the Wheel Bearing and install it again successfully.
Rieju NKD 125 Workshop Manuals provides unique diagnostic guidelines for the car therefore if something is wrong it helps you identify what the issue is and tips on how to repair it. You can then assess if you can do this yourself or in case the job is just too big you can actually make a reservation for your NKD 125 into a nearby repair garage.
Rieju NKD 125 manual