MCN is reporting that the days of 125GP may be numbered as Dorna and the FIM get ready to replace the small displacement GP series with what’s being called the new Moto3 race class. Drawing from the formula found in Moto2, Moto3 features prototype bikes with 250cc four-stroke single-cylinder motors. However instead of a single-spec motor rule, as found in Moto2, Moto3 appears to be open to multiple engine manufacturers.