Not sure what's going on with my bike but on an easy accelleration she will bust up right when I hit 3800-4000 rpm and then it's done. It only happens when I ease the gas...under hard accelleration it doesn't miss a lick. If I am cruising and the rpms fall in that range it will bust up again until I get out of that range. Obvious answer is to not ride in that range (figured I'd say it before anyone else did). I'd like to rememdy it because it's prob. the forefront of another problem. After doing some research on here, I couldn't find anything that sounded like my problem. Bike has 14k miles, pc3, bmc air filter, brocks full exhaust, and brocks dyno tuned for 87 octane fuel.....after finding that out I went from 93 to 87 to try and clear it up and no luck.....a little sea foam through the tank and some lucas and still nothing. I changed the plugs, cleaned the filter, and still getting it. I'm going to take off the pump and inspect, and also the lines...hope to find the problem there. Anyone have any suggestions/comments? Thanks!