not trying to start shit with ya, but a 4.7 with a +4mm alky bike seems really really slow, we have gas 350 here running 4.5-4.7 in the sand. i am guessing a 450 would run a mid 5. i can get the vids to work since i am at work, but i have seen a 450 not stock (cam header silencer ultra light paddles +4 over arm, lose to a stock banshee with pipes, everytime they raced, and the guy was a hell of a rider, he also had a very very fast +5mm stroker banshee that was kicking ass. so i know that in the sand up a hill there not FAST!!!!!!!!!!!!!1