I just checked my air filter and it does seem very dry; even when i squeeze it, absolutely no oil at all is left on my fingers... I used this "synthetic water washable" air filter fluid crap from "Rock Oil" that I bought from Parts + Accessories + Performance = ProCycle. Maybe this stuff doesn't work very well? Maybe it needs to be applied every 500 miles? Water is getting in there somehow when it rains? IDK...but it seems somewhat feasible that this dry filter could be causing a leaner air/fuel mixture, in turn causing my hot orange header, especially if my jetting is already borderline (almost too lean). Maybe I'll turn the fuel screw out 1/2 turn (richer) and also buy a new filter (use some god damn conventional filter oil this time...). I guess I'll try this and report back. In the meantime feel free still comment.