My pulley looks fine. I will data a run now that some feel it is slipping. I guess that is a possibility. I don't run shims on mine. As long as I can stop the pulley from spinning at idle with my hand, I am good with it. I like the shield chris has come up with, and there are a few specialty bolt shops around here, so I will see what I can come up with. Chrome hex head maybe? Later...going to the Moto GP race....