So I bought this engine, thought it was a 447 model, didn't bother to check, got it home and ran the vin: 3U6-000675, comes up as a 1979-1980 XS-SG (oceania, Can, Other) what the hell is this? can I use Part #05-0750, which is a Big Bore 750cc Cylinder and piston kit from xs650direct.com. on it...