Honda spent over a decade hiding a piston that wasn't round. The NR500 barely finished a Grand Prix lap. Its $50,000 street-legal descendant, the NR750, is why oval pistons still get engineers arguing today. Genius engineering or an expensive apology? Tell us in the comments 👇 #motorcyclehistory #hondamotorcycle #nr750 #motorcycleengineering #superbike #motorcyclelife #japaneseengineering #motorsporthistory #rarebikes #hondaracing #onelungracing