Honda S600/S800 Roadster
Introduced in 1964, the S600 was a two-seat convertible with compact dimensions powered by a tiny 600cc engine. It had 57 HP but felt lively since the car weighed just 1500 pounds. Interestingly, the S600 had chain drive, a primitive drivetrain system from motorcycle production. In 1967, Honda introduced the S800, an upgraded and more powerful version with a bigger 800 cc engine and 70 HP, which was also available as a coupe (via Car Magazine).
The production was over in 1970 after more than 22,000 Kei car roadsters and coupes were made. The car wasn’t initially popular on the American market, but today, it’s sought-after by collectors.