OK I just want to start out by saying I have done everything I can think of and everything suggested by this site. I have cleaned all jets pilot, main I have set floats new plugs fuel line filter in fuel line redone the tank, set pilot screws. The bike runs great Idles great plugs are clean it runs great until you get past 6500 rpm then it cuts out completely. if you hold it wide open it will not die but drop down to 2000 and just sputter. It isn't running rich and is not dumping fuel.I don't think it is a fuel problem. Oh yes petcock works fine too. So am I off my rocker thinking it is an ICC box? I just don't know it runs great starts right up with no problems just can't give it any gas past 6500? By the way very usefull stuff great site for 500's.