The large, two-stroke Springville Power engines not only run lean, Sartain added, they are also “dual-fuel” units, using 90 percent natural gas and 10 percent diesel fuel.

The Thunder Stroke 116 was previously offered as an upgrade package for the Thunder Stroke 111 engine, but now you can get Indian's largest motor in its touring and bagger lineup.

Read about two stroke engines and how they relate to hybrid cars in Sport Compact Car magazine. News. Reviews ... make a big, negative pressure wave hit the exhaust port while it's open, ...

The four-stroke engine has dominated internal combustion for more than a century, but a British engineering firm is ready to topple that technology with what it calls a 150-horsepower “five ...