The motorcycle engine has come a long way from its auspicious 19th-century beginnings, evolving over the years to include ...

Early in the history of motorcycling, everything was four-stroke. Four-stroke engines ... cycle during one revolution of the crankshaft during the combustion process. The cylinders in a two ...

How hard could it to be to build a two-stroke internal combustion engine (ICE) from scratch? This is a challenge that [Camden Bowen] gladly set for himself, while foregoing such obvious wastes of ...

Porsche has filed patents for an engine cycle with two combustion events for every six strokes (or three rotations of the crankshaft). They call it a 2 x 3-stroke. I’d humbly suggest it’s a 4 ...