Its four-stroke engine used a pair of side-by-side pistons to make 2 ½ hp, driving a bike that could achieve up to 30 mph. Two-cylinder engines are complex and heavier than single-cylinder bikes ...

It’s an Open Source Two-Stroke ... engine first produced in the early 1930s and continued production through World War II. This is a weird engine, with two opposed pistons in one cylinder ...

We’re introduced to the traditional two-stroke diesel engine as thermally efficient but not smooth-running, and then the gas turbine as smooth but much more inefficient. The free piston engine ...

That's right, someone took a 401cc, 2-stroke, 3-cylinder ripper and put from a Kawasaki ... When the KV75 launched in 1971, its 75cc 2-stroke engine pumped out just four horsepower at 6,500 ...

The new Two Stroke would be completely new engine that would be positioned to power motocross bikes that the brand promote ...