Honda’s high-revving alternative to the smoky two-strokes of the 1970s.

Introduced in 1970, the Honda SL100 Motosport arrived at a time when the lightweight off-road market was utterly dominated by noisy, oil-burning two-stroke singles. Honda, committed to its overhead-cam four-stroke architecture, proved that a small-displacement thumper could be lightweight, clean, and incredibly durable on both dirt and asphalt.

At the heart of the SL100 was a 99cc, single-cylinder, air-cooled engine featuring a single overhead camshaft (SOHC). It kicked out roughly 11.5 horsepower at a screaming 11,000 RPM. Paired with a slick 5-speed transmission, high-mount exhaust, and full street-legal lighting, it gave a generation of riders their absolute first taste of true dual-sport freedom.