A two-stroke engine combines intake (“scavenging”) and compression into one stroke, then ignites the charge and exhausts it on the next stroke. Unlike a four-stroke and its every-other-stroke power ...

If you race motocross, you might wish that two-strokes would make a comeback. They’re generally cheaper to maintain, easier to work on and are lighter than their four-stroke counterparts. And, thanks ...

The sounds. The smells. The feels that electrify the senses and carry you back to simpler times. For many motorcycle enthusiasts, working and riding on two-stroke bikes capture the essence of a bygone ...

Porsche was issued a patent for its six-stroke combustion engine on October 22, 2024. The company describes the new engine as having a "working cycle" of three complete crankshaft revolutions with two ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the most significant contributions in the history of propulsion technology came from a 19th-century engineer named Rudolf ...

Gearheads and faithful Jalopnik readers already know the basics of an engine's bore and stroke, but for those that might be new here, let's dip our toes in the shallow end. An engine's bore refers to ...

The story of how Honda developed an oval-piston race engine that ultimately failed but still made history along the way. Honda pioneered oval piston technology in the 1970s for four-stroke racing ...

What if the engine of the future wasn’t just a dream, but a reality? Imagine a power source that combines the raw, exhilarating performance of a two-stroke engine with innovative efficiency, ...

Porsche has patented a revolutionary six-stroke internal combustion system. Contrast to all modern combustion engines that run the four-stroke Otto cycle that typically features one compression and ...