It actually stands for New Racer. Without the failures of people trying new things we would still be riding horses.
I remember buying a motorcycling magazine in Italy, in Italian which I don't read just to try and get the details of the NR750
I wonder how much a top end rebuild is worth ? eg new piston's and ring's and if they are still available too Would they have made O/S piston set's for them too ? Car stuff can be hard to chase after 10 year's, the manufacturer's don't need to make replacement part's any more