Belt noise

2002 Titan Custom street Bike, with a V107 S&S motor. I have adjusted the belt many times and cannot get the noise to quit. The noise sounds like a rubbing/vibration sound. Initially, after adjustment, the noise goes away for about 10 miles then it comes right back. I have aligned the tire, tried belt dressing, but nothing helps.

The problem was a worn drive pulley on the tire. It is being replaced.