Ok, installed my overdrive pulley, took the bike down the road 1 mile, returned home. Noticed a new humming noise on deceleration at speeds around 30 or less. Not quite as worried about the humming and more about checking alignment, belt tracking, and tension. I pull all the covers. I get the flashlight out and im looking around and I see flecks of what looks like rubber all around the area where the belt tracks. So I start to inspect the belt and I see what looks like where the pulley is digging into the belt. Anyway this is my first pulley swap and I have about 2 miles on the bike since the swap. I cant decide whether this is normal and the rough edges on the pulley were just breaking in, or if I have a problem. I would appreciate advice from those who have done the swap about their experience. Let me add that alignment and tension are both perfect. I purchased the Kawasaki tool to measure tension and its dead nuts. The belt is tracking just a few mm off the outside edge just like it did on the stock pulley. I am not a professional but I did this install pretty much perfect.