all i did was go down the road so far....it sounds SOOO SWEET. the video makes it sound different. its a ton better in person. it feels alot more snappy, i still need to put the 170 main jet in, right now its at 155.
If you look at the dyno graph at HMF the head pipe does not help until about 6000 rpm. I thought I would save the $$$ for other mods. For trail riding, I stay in the lower rpm range. I could not believe the power gains just a slipon.
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