you would be wrong. I used to work at bentley’s back in the day when Mike Jones raced for them. i used to get to race and ride alot of his old bikes. and i rode a his last kx500 from the 500 nationals. motor was all done up. the acceleration just don’t compare
No, this motor would not be anywhere near legal for normal mx racing. this guy gets 90 horse out of a 250 engine.