According to the videos EBR posted on youtube some time back, the 1190RS engines start out as standard 1125 engines. Each of those engines has to be disassembled, then many of the parts are discarded. New or re-worked parts including heads, valves, cams, springs, cylinders, pistons, rods, and the crank are installed and the engine is reassembled. That's a big waste of labor and material. If the 1190RX/SX/AX engines are built new with all the required parts on a production line, it seems the cost of the engines will be MUCH less than the 1190RS.