Ok here is my dilemma. Not sure if I’m even posting in the right place. But I have a 2009 ktm 530. I blew the motor up and need a top end I have a line up on a cylinder and cylinder head off of a 2012 500. The numbers on the 2009 cylinder are 78630038300 and the 2012 are 78730038000 what is the physical difference between the two and is it possible to put a full top end off of a 2012 500 onto my 2009 530 bottom end? Any help would be very appreciated.