650 in flat-track racing
I know there's not a lot of racing talk on this forum, but if anyone's interested, there's an article by Henny Ray Abrams in the March 2011 issue of Sport Rider magazine about the Kawaski 650-based flat-tracker.
More than any other form of racing, flat-track is less about maximum power and more about getting the bike dialed in just right for the track and conditions. Once they get more experience, I think the wins will start piling up. As Hall of Fame tuner Bill Werner pointed out, he can buy an entire Kawasaki 650 engine for less than the cost of a Harley XR750 crankshaft. Given the lack of money in AMA Grand National flat-track racing these days, that's incentive for those who want to go racing and aren't indepenently wealthy.