Acerbis X-Brake Vented Front Disc Cover (FLO-YELLOW/WHITE) The X-Brake Vented, Acerbis' newest front disc cover, provides unparalleled protection, strength, and design. Features a dual mold-injected design to keep sticks, rocks and other debris from damaging or becoming tangled in the front rotor. Also features ample venting to keep the brake cool in all conditions. The cover also provides protection to the brake caliper. Constructed of durable polypropylene and features a carbon fiber like texture.