i have a 400 cheata cub and it has procuircuts on it, the last trip i took up to oregons dunes sucked. every hill climb i tried i had to work at. no bottom end whatsoever it was all or nothin, either burry the throttle and ride a wheele up it or stop and try again. i hoped on my wifes banshee that has stock motor and t5s and it went up it no prob. so i called cascade and they said i sould get the paul turner mid pipes and it would make all the difference. so thats where im at, ive done a few things to help out the bottom end since that ride. i went with 20cc domes instead of 22cc, advanced timing 4 degrees, and now im running 110 race fue (ouch)