The bike in question was the 1992 NR750, which was produced in limited numbers; it's believed only 322 were ever built. How Ferrari's Oval-Shaped Pistons Differ From Honda's While Honda's old and ...

The NR series by Honda, including the NR500 and NR750, failed in racing but left a significant mark on motorcycling history. It was a complex engineering feat with oval pistons, twin camshafts ...