Yea the power valve is working great. Done leak down when i rebuilt the bottom end i used all new oem seal and o rings. It did run better today.  I m just wondering if their enough port work for the shearer pipe. The mid range and low end is unreal how good it is. But something not right with the top.  If a silencer is pack to tight would that effect the top or would that effect the bottom. I m going to throw the fmf back on and see if it does the same thing. When i had it on the bike was fast bottom to top. Dont get me wrong it wasnt a rocket. But it would hang with some other bike that were pretty quick.