Doug - here's something that happened to my bike at the national. VERY weird, and weird to diagnose, but I got it... Basically it would idle fine, and accellerated in first gear with LIGHT throttle fine till about 6k, then it would start missing. Second gear it would start missing at a lower rpm, and 3rd was lower yet. If I tried to use higher gears and just cruise, it had a miss. Let it idle, and it was fine. Of course I thought "bad plug" and / or "bad gas" and checked for both. Then I thought about the good idle, and knew it wouldn't idle well with a bad plug, bad fuel, or a vacuum leak. I figured that the carbs sucked trash into a main jet. Not likely, since I had just put them on 3 weeks before the trip, but hey sh*t happens. I pulled the carb tops, removed the slides, and fished a wire down through the needle jets to the bottom of the bowls. Problem solved! I'm not saying that's your problem, but use all the info you can to help diagnose. How's the idle? at what point does it start to act up? is it RPM or throttle sensitive? Post it up and we'll take a shot at it. Steve