Two-stroke engines were phased out by tough pollution laws, but they could be making a comeback with KTM, ... The Ronax 500 is powered by a fuel-injected 500cc two-stroke V4 with 119kW at 11,500rpm ...

The chassis is similar to that used on the Ilmor X3 and it is part of a real MotoGP bike that weighs 125 kg/ 275.5 lbs and benefits of precisely 200 hp developed by the two-stroke V4 of 500cc.

Pioneers like Thomas Newcomen and James Watt created ever-improving steam engines.  Over time, horses fell by the wayside as people took to this new mode of transportation. Railroads began ...

Powered by a 576 cc V4 two-stroke with two counter rotating crankshafts, ... Even more intriguing is the undersquare geometry of the engine’s cylinders; at 56 x 58.5 mm (2.2 x 2.3 in) ...

The firm has now showcased its two upcoming V4 engines at the CIMA Motor Show in China. The larger of these engines, dubbed the BD476, is a 1198cc, water-cooled, 16-valve, DOHC unit. Peak output ...

Like Lawson’s works YZR500, the RD was powered by a twin-crankshaft V4 with cylinders spaced at 50 degrees. It had near-identical bore and stroke dimensions and followed the race bike’s twin ...

The new V4 engine delivers an impressive 209 horsepower at 14,500 RPM and 84 pound-feet of torque at 12,500 RPM. At the heart of the new superbike is CFMoto’s innovative 1,000cc V4 engine.

Despite Yamaha’s efforts to keep him quiet, Alex Rins revealed that the new V4 bike was two seconds slower than the current ...

“As Yamaha, we had a V4 two-stroke, but we never built a V4 four-stroke,” Bartolini replied, when asked if it was exciting or stressful to oversee the creation of a brand-new MotoGP bike.