The serial number on my ST is 6207491. I'm the second owner. The original owner immedately put cast iron dual rotors on it and 980cc components. The oil pressure switch failed out on Rt129 10 years ago and ruined the crankshaft. That's when it became a 1050 long-rod. (Carillo rods are 10mm overlength with piston pin under oil ring.) Fuel injection can be reprogrammed by popping off the seat and plugging your notebook.