General Motors is working on a novel two-stroke concept designed to avoid the classic weaknesses of this type of engine. A recently published patent application shows how an electronically controlled valve system could reduce emissions and improve efficiency and durability.

MV Agusta is working on a new engine concept that differs significantly from classic designs. The so-called Cinque Cilindri combines five cylinders in a compact arrangement reminiscent of VR engines, but without adopting their typical V-structure. The concept was first unveiled at EICMA and subsequently supplemented with further information.