I have riden with guns with this motor and have ridden his quad, it does run extremly well with good power everywhere, I have riden cubs as well and the only place they are better is a perfect straight line race... to me the serval is for anyone looking to actully ride the bike and like guns said you can always get it touched up to make more power basiclly have it ported to your exact needs!!!! unlike the cub which is already setup to high for riding, its meant for drag racing.