The two-stroke engine is mostly a piece of history today, but there was a time when some of the coolest developments in engine technology were two-cycle engines. Here’s how two-stroke technology rose ...

The 1958 DKW 3=6 looked like a modest family saloon, but its engineering was a quiet rebellion against four-stroke orthodoxy.

Two-stroke engines used to be ubiquitous in dirt bike racing, thanks to their lightweight construction and horsepower. Packed in a dirt bike frame, they make a motorcycle playful in the corners and ...

Unless you're really into dirt bikes, you probably haven't touched a two-stroke engine in decades — if you ever have. These mechanically simple motors combine the four strokes we all know and love ...

Hirth and ePropelled develop hybrid propulsion systems for UAVs and drone technology with extended flight duration.