If you wish to undertake maintenance on your own Rieju NKD 50 then it will always be a good idea to have access to a Workshop Manual for a guide if perhaps you need to know how to take off a particular component for example Door and install it again accurately.
Rieju NKD 50 Workshop Manuals are able to offer certain diagnostic guidelines with regards to your car or truck so if something is broken it will help you identify what the situation is and how you can make it better. You can then evaluate if this can be achieved on your own or in case the job is too big it is possible to book your NKD 50 into a local mechanic.
Rieju NKD 50 manual