Originally Posted by PhilB
The RC8 isn't 1290cc; it's 1190cc, to fit into the literbike racing limits. I'm sure this engine would be closely related to that, but is not the same exactly. A minor point, but true.
I know what the displacement of an RC8 is, that is why I said a 1290cc RC8 motor, not just an RC8 motor. It is a big bored version, likely with milder cams, but more torque, a lot more.