I have noticed my beatiful swept pipes seem to be under attack. I started noticing (more so since I had the swepts installed) that there is black stuff melted onto my pipes. Looking at it it apears to be coming from the belt as it is mostly on the top pipe and thicker towards the pulleys. Is this from normal break in on a new belt? My bike is new (only 3000 miles so far). I have not noticed any other signs of abnormal wear, and nobad squeal from the belt. It does make an odd kinda whirring sound at certain speeds/throttle settings, it isn't too loud and seems to come from the rear pully.
Another note is I did find a way to get the pipes cleaned up. I used amaguires clay bar which gently removed the small stuff. Some of the larger spots I lost patience with and gently scraped them off with a razor blade then went over it again with the clay bar.