The SM 6065 is a heavy-duty Starter Motor Armature (Self EGT Assembly) specifically engineered for the Bosch-style (B. Type) starter motors utilized in the Piaggio Ape BS6 (Diesel and Alternative Fuel) series. This variant is uniquely characterized by the "With Teeth" shaft design, where the drive-end features integrated gear teeth (splines) designed to mesh directly with the BS6-specific reduction system.