We have discuase this engines a while ago. It is the same as 13.76X14.04 engines. In my assumption, this is step to promote new management in Novarossi (Mario Rossi has gone to AXE Rossi company). In general nothing been changed. The difference is bore strock is 0.08 %. There are some possible chanages in case pressure and vacuum levels ( longer strock will create more pressure and deeper vacuum), but without real messuring difficult to make statments. There were changed outside mesurments for sleeves. In general speaking the same engine.