All articles tagged with #two stroke
Kawasaki unveils the all-new KX327 and KX327X—327cc fuel-injected two-stroke motorcycles built on a KX450F chassis with an aluminum perimeter frame and premium suspension, marking the brand’s first new over-250cc two-stroke in more than 20 years; the release also highlights 2027 updates to the KX450F/450X and KX250F/250FX with stronger power, revised frames and electronics and expanded Rideology app connectivity.
In the 1950s Saab engineers created the Saab 93 "Monstret" by mounting two 748cc three‑cylinder two‑stroke engines in the front, effectively forming a 1.5‑liter twin‑engine powerplant that produced about 140 hp for rally testing. The result was a terrifying, understeer-prone beast with brutal torque, clocking around 122 mph in testing but never intended for production. The project taught Saab important lessons about chassis limits and helped steer the brand toward later turbocharged designs, with the Monster now housed in the Saab Car Museum.
INNengine’s e-Rex (and Rex-B) are ultra-compact, four-cylinder engines with eight opposing pistons on thrust plates, marketed as “1Stroke” even though the cycle operates as a two-stroke—combustion/exhaust in one pass, intake/compression in the other. The design aims for high power density, smooth balance, no traditional valve train or oil burning, and on-the-fly variable compression. INNengine claims about 120 hp from a 500cc unit and has tested it in a Mazda Miata, envisioning it as a range-extender rather than a replacement for conventional engines.