The motorcycle with the smallest single-cylinder engine is one that no one could have anticipated. In fact, many don't even know that Bridgestone, the tiremaker, once used to make cool motorcycles.

Part of this versatility comes from the 650's single-cylinder engine. This bike's heart is a 644cc SOHC, four-stroke, air-and oil-cooled engine. It's strong, but not too complicated.

Triumph's new liquid-cooled, single-cylinder engine seems to boast a fair amount of power in a small package. It probably won't be competing with its larger V-twin siblings in a drag race any time ...

While we’re on the subject of small, fun single cylinder sportbikes, here’s one that you wish you had ridden, no matter where in the world you are. In Europe, you can ride a 125cc motorcycle ...

First manufactured in 1948, the original BSA Bantam was perhaps one of the most iconic two-wheelers that ushered in a new era ...

Yanmar makes these water-cooled, single-cylinder diesel engines that you can use for virtually anything, from agricultural to marine applications. Caleb Jacobs Feb 28, 2025 3:00 PM EST 0 ...

Those are according to Ducati "values never achieved before by a road single-cylinder" engine, but they can go even higher, to 84.5 hp at 9,500 rpm, when fitted with a Termignoni exhaust system.

Wright Aeronautical originally designed the Wright R-975 Whirlwind, which was a series of nine-cylinder, 975-cubic-inch radial aircraft engines, all manufactured between 1929 and the 1950s.