The SM 6134 is a precision-molded internal component designed for the latest generation of Bosch-style (B. Type) reduction starter motors. This high-density EGT (Epicyclic Gear Train) plastic cap is specifically engineered to house and align the planetary gear assembly in the Piaggio Ape Type 6 series. It serves as a critical structural guide, maintaining gear synchronization while protecting the reduction mechanism from grease contamination and internal friction wear.