Graves Motorsports Yamaha YZ450F + YZ250F Supermoto Brake Master Cylinder + Front Brake Line Kit. Developed by the Team Graves Yamaha supermoto team for use on Yamaha supermoto race bikes. This kit is designed to boost braking performance and feedback at the lever. Kit includes new master cylinder with a shorter, folding brake lever and a stainless steel front brake line. Championship winning performance supermoto and off road parts from Graves Motorsports.