well my bros buddy has a ds wit only a mod encap(cut off restrictor tubes and spark arrestor) and wit his stock 20"s he beats him everytime,but wit his 22" vampires he'll b behind by a length or two, i was on it and raced the yfz wit 2 ppl on it(even out weight dissadvantage) and as i was roling up to the line he took off so i was 2 length behind and by the end i was like at his back tire