Two-stroke engines have steadily fallen out of favor over the last 50 years or so. While they sport great power-to-weight ratios and are often much simpler mechanically than their four-stroke ...

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 ...

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 ...

Making a new engine while the world’s rushing to switch to electric vehicles only? Mazda said, “why not?” There’s a new innovator in town and it wants you to pay attention. Mazda’s SkyActiv-X engines ...

One of the most significant contributions in the history of propulsion technology came from a 19th-century engineer named Rudolf Diesel. While his idea was patented in the 1890s, it wouldn't be until ...

The last time you may have heard that distinct, high-pitched sound of a two-stroke engine was probably when you fired up a leaf blower. That's because they have fallen out of fashion when it comes to ...

Unit shown in the bottom of the photograph has been removed to show operation of the V-drive which is base of V-four engine.Ring gear shown on lower shaft of top unit is driven by a pinion mounted to ...

Kawasaki just did the unpredictable. Just when most of us thought the era of two strokes was over, the Japanese bikemaker has ...

It's been a long time since the automotive world has bothered with the mixing of oil and gas of the two-stroke combustion cycle — but soon, it may come time to rid ourselves of four-stroke engines, if ...