I had a friend out for a ride and just didn't have that scary SOTP pull it usually has, I thought maybe I was just getting use to it, but it kept bugging me so I went out and looked under the hood, did the finger test and found some black soot on the inside of the pulley guard, I know I read on here that thats evidence of some slippage, I have the stock pulley, I did'nt think it would be an issue with the stock pulley, anybody else experience slippage with stock pulley and is this to be expected as normal.