destroking a crf450 motor

[ovalracer44]

does anyone know if there is a cylinder or cylinder sleeve and a crank to destroke a crf450 motor to a 300cc motor

[soyo]

i think that would be impossible. why would you even want to do this? then you would have to much head for a small motor, and you cant go down on the bore size or the flow would be on the top of the cylinder!

take a crf250 and make it a 300cc!! much cheaper!!