Yamaha R3 All Models Sigma Slipper ClutchSome smaller bikes have missed out on the benefits of slipper clutches but we can now bring the undoubted benefits of a good slipper clutch to the party. The clutch uses standard springs (preferably new) and the standard clutch pack. The Yamaha R3 has great potential on the race track .. and our clutch improves its performance no end. Improving corner entry stability and helping to limit excess over revving on corner entry. By reducing the amount of