Originally Posted by IgoFar
I believe that the last 500s that were raced in the nationals were pumping out about 70 HP give or take a couple. Todays 450s, I believe are at around 55 give or take a couple. But the trick to the 500s was to spread all of that power through out the RPM range. This wasn't always easy, and if you couldn't get it right, it could be a real handfull.
where did you get those dyno numbers from...there are few kx's making in the 70 hp range now
If you cant ride it on one, ride it on two