The SM 4475 is a specialized Self Starter Rocker Assembly (Brush Holder) designed specifically for the Piaggio Ape Xtra series. Utilizing the robust Bosch-style (B.TYPE) architecture with a high-efficiency 4-brush configuration, this assembly is engineered to meet the heavy-duty cranking demands of the Ape Xtra's high-torque diesel and alternative fuel engines. It is a critical component for ensuring reliable starts in commercial transport and load-carrying applications.