The Honda NS500 is a 500cc Grand Prix racing motorcycle of the early 1980s, powered by a two-stroke V3 engine.

Created as a replacement for the innovative but unsuccessful four-stroke NR500, the bike went against Honda's preference for four-stroke machines but proved very effective and quickly won the 1983 500cc World Championship with Freddie Spencer on board.

[2] Ron Haslam also won the 1983 Macau Grand Prix on an NS.

After a relatively short lifespan the bike was replaced by the more successful two-stroke, V4 engine powered NSR500.

[3] These were very similar to the NS500 machines used by the factory racing team but, lacked the special exhaust system.