i just had a bunch of top end work did to my yamaha banshee and i was told that installing racing clutches or motorcycle clutches will also improve my banshees peformance. but when i ask my shop mechanic about these clutches he said that they didnt exist and tht the original stock clutches will be the best for my bikes. do anybody know if its best for the stock clutches or do the racing clutches if they exist works better????