By the 1960s, the two-stroke engine powered superbikes in the GP World Championship. ... In other words, two-stroke 125cc bikes would have to race 250cc four-strokes, ...

The culmination of their work was the 1966 RC166 motorcycle, which used a 250cc twin-cylinder engine that produced 280 horsepower per liter and revved up to 20,000 rpm, one of the highest-revving ...

A two-stroke engine has a combustion cycle with each crankshaft revolution, ... Drag Race: A 2-Stroke 250cc Sports Bike Troubles A 500-HP Toyota Supra. Two-stroke Aprilia RS250 '90s sports bike.

KTM’s two-stroke patent. The system also dispenses with pre-mixing oil and fuel. KTM will make 250cc and 300cc versions as early as May. Meanwhile, German company Ronax and Switzerland ‘s Suter Racing ...

The Aprilia RS250's 250cc two-stroke motor produces in excess of 60 brake horses, giving it a specific output of 240 bhp per litre - more than the fastest MotoGP bikes and on a par with F1 engines.

Proving there is still life in the two-stroke engine is new British company, Langen Motorcycles. They will unveil a limited-edition, bespoke model, eponymously titled the Two Stroke, at the Salon ...

It's evident that 450cc four-stroke dirt bikes are faster than 250cc two-strokes. If the 450 wasn't faster, professional motocross and supercross riders would be racing 250cc two-strokes.

Motorcycle maker KTM has developed a two-stroke engine with fuel injection that it’s launching in new enduro models this year, ... The engine will be available in 250cc and 300cc versions, ...

Back in 1998, the American Motorcycle Association introduced a rule that allowed extra engine capacity—450cc rather than 250cc—for four-stroke motocross race bikes, and manufacturers got to work.