Make sure you read it completely...this only works if you have a race pipe and are looking for 1-2 hp ?!?! Doesn't seem to make much sense for a street ridden motorcycle. My guess is that you will give up some low end power for a minor increase in peak power...not usually worth it. Personally, I would like to see real hard dyno data first (when I get a dyno, I'll be looking to do these kinds of experiments).