I recently started a thread " baffled about baffles " in this column. Now that I'm pretty sure that fuel contamination is not the problem, I have a question. The bike will run well after cold/warm start until I ride 3-5 miles at hwy speeds. better than 50% of the time if I fill with fuel the problem will go away for a short or not so short time. What could filling the tank do. I would have bet that trash in fuel was the issue, but it isn't. Fuel is clean from tank to float bowl. ?