If you want to accomplish maintenance for your CSR NKT 125 then it will always be recommended to own a Workshop Manual to keep just for personal reference in the event you want to know ways to take out a particular part for example, the Brake Discs and fit it again effectively.
CSR NKT 125 Workshop Manuals will give you exact diagnostic details for your car so if something is wrong it will help you figure out what the issue is and easy methods to repair it. You will be able to analyse if this can be done on your own or if ever the job is too big you could make a booking for your NKT 125 right into a trusted car garage.
CSR NKT 125 manual