There's been alot of discussion on the various forums about advancing the exhaust cam in order to reduce valve overlap, and shift the torque curve towards the low end. Since I figured out that my cam profiles gave me 41 degrees of overlap, I had the room to spare to take out 15 of those degrees, and reduce my overlap to 26 degrees around TDC. So anyways, I had friday off, and after replacing my countershaft oil seal, I went ahead and advanced the exhaust cam one tooth. I don't have any dyno results, other than the butt dyno, but I think I can validate every benefit that's been said about this mod. The idle is smoother, less lopey, and the grunt definitely comes on earlier than before. While accelerating, the exhaust had a deeper tone, and the bike just pulled with more authority than before the mod. So FWIW, I was very happy with doing this mod. I realize that I'd probably lose some of the grunt in the very top-end, but I rarely push the tach over 6000 rpm, so I was willing to make that trade-off.
