Well hell, we don't even need 2010 two-stroke technology to be competitive. Take an old 450cc engine, put that in a modern frame with modern suspension and brakes, tune it up a bit like any good racer, and I guarantee you'll be more potent than a 450F. Or, like you guys have been saying, something in the 350cc territory would do. And really, once you get above 350cc or so, if you're really on the powerband and doing your damnedest to give it all she has, no one's going to catch you on a 500 unless they have enough space to get into the higher gears. Their reward for extra cc's is going to be the ease with which they can fly around the track at warp speed. As many riders unfamiliar with the 500's ways have found out, if you hammer it and ride it like a 250, not only will you be putting your life in serious jeopardy, but you will also probably go slower than if you took it easy and lunged about on waves of torque.
