not much more than stock. you might be looking at a couple HP. again HP depends on how the engien is set up and environment. temp, altuitude, and jetting all play a part in HP. so in reality your HPis never gonna be the same all the time. inless of course you always have optimum jetting. and truthfully who has optimum jetting anytime??? not me. reading a plug and going up or down a size is far from optimum. but it works great for people like us who are just playing or maybe doing some sunday racing. the only people that would even notice that difference is a PRO rider if they can even notice it. |