I read somewhere that that made the M motor "square" (stroke vs. bore) to keep the high RPM abitly. That I belive that was Mr. Faherry (spl?) argurement to raise the rpm cut-off and rebuild the crank hub. So by stroking our motor, we would break the "squarness" and potentially lose some high rpm abity at the gain of all around HP and the tourqe would come on at a lower rpm too. Does anyone know what the dimentions of the euro 3.8 are?