wow, almost 400 rpm change in crank speed over one revolution, that's violent. it says over the top of the graph "four stoking" does that mean it's running so rich it's firing on every other stroke? that's what the graph seems to show. i think the only way to get rid of torqe impulses would be a mult-cylinder engine, now if they were just a little cheaper......
I remember reading somewhere that a single of a certain displacement will put out more power than a twin of the same displacement, i can't see why that would be true, can anyone shed some light?