(Robert Martin/) Who remembers Honda’s NR500, the oval-piston V-4 four-stroke whose intensive and costly five-year development was intended to stop the two-stroke tide in FIM Grand Prix roadracing?

The 1992 Honda NR750 oval-piston street bike. Like the legendary CBX inline six from 1979, which was another poor-selling (but also broad market) “statement” bike by Honda that’s now a ...