FIM made it official today in Assen. 600cc four-strokes will replace 250cc two-strokes in 250GP beginning in 2011. Further rules will be decided at some non-specific future date. Dorna’s full, but exceptionally brief, release after the jump.
Replacement of the 250cc class
For application from 1.1.2011, the Grand Prix Commission accepted the
following proposal, taken by the majority of members of MSMA: 4-stroke
engines of 600cc maximum and 4 cylinders maximum. A request will be
sent to all manufacturers. The candidatures of the manufacturers
interested in taking part in the new class must be sent to the FIM and
Dorna by July 31, 2008 at the latest. More precise technical
specifications will then be discussed and established.