Moto2: New formula considered for 250cc
The 250cc class could be replaced in 2010 with a prototype four-stroke engine when the current rules structure comes to an end
No specific detail has been discussed, but an initial combination of two and four-strokes, just as it happened in the MotoGP class in 2002, is one idea, with a 400cc twin engine one configuration being discussed.
An insider from the MSMA said: "By May things need to start to take shape for the future of the 250 class.
"My heart says that we should stay with 250, but in reality, we are going to have to move on."
The Piaggio Group who own Aprilia, Gilera and Derbi make up 70% of the 125cc grid and 66% of the 250cc grid, leaving KTM and Honda to field the rest of the bikes in the two-stroke fields.
KTM's Harald Bartol has said that is not concerned if any of the classes turn towards being a four-stroke formula.
"I'm ready to make a four-stroke engine right now if there is a need," he said.
Dorna have a contract with the FIM to run three Grand Prix classes, and there are rumours that the 125cc class may change to 200cc single cylinder engines.
However, there is uncertainty regarding whether they would be as fast as a current 56hp 125cc two-stroke, let alone have the thrill factor or the sound.
The 500cc formula started in 1949 and ran until the end of the 2001 season, after which 990cc four strokes were introduced. Those won every single race until the end of 2006.
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