These YZ125 clamps offer a full factory rubber mounting system. With 1.5mm less offset that stock, these provide quicker turn in and more weight placement on the front wheel. It saves 7-8oz over stock. Our rubber mounted anti-twist bar mount is required (YZ-BBM00-CA) along with poly cones (CR-PC00Y-KT) and hardware ( MX-10125-KT). This set was installed on a bike but never used.