I replace the front pully with the scootwork pully I order. was a bit nervous about picking up a belt wine that I have read so much about. mine had a slight wine with the stock pully, but it was nothing that bother me. I really belive that it is the trans gear that has the wine and not the belt. don't know that for sure. anyway I took my baby down the road this morning and like the way the pully worked. I still had the slight wine that I had with the stock gears, but it is no worse. I took it on the highway and 70-75mph was alot better with the pully change. with the stock pully, 70 was almost unbearable, with the vibration. actually it may have been less than 70, thinking how bad the speed odom is off. well hopefully this pully will fixed that. I made this pully change because some of the guys I work with wants to do an Iron butt run. 1,000 miles in 24 hours. I have the smallest cc's bike going. not that a 900 is small, but most bikes that are going on this run are over 1300 cc. I figure the pully change will help me out some.