Can anyone assist. Just bought a XS 650 engine. Apparently it came out of a 1983 xs650 Special Heritage model. Can anyone tell me where the engine numbers are stamped on the xs engine. Also I need to get a rotor and generator. Behind the left cover, all I have is a bare crank end showing. Seems to be various different types for the XS 650, and I have no idea which one i need for this engine. Any help appreciated.