DRT primary drive (Z 62-18)

Vespa 50 N V5A1T , Vespa 50 L V5A1T , Vespa 50 R V5A1T , Vespa 50 Sprinter V5SS2T , Vespa 50 Special V5A2T , Vespa 50 Elestart V5A3T , Vespa 50 Special V5B1T , Vespa 50 Elestart V5B2T , Vespa 50 Special V5B3T , Vespa 50 Elestart V5B4T , Vespa 50 PK V5X1T , Vespa 50 PK S V5X2T , Vespa 50 PK S Elestart V5X2T , Vespa 50 PK XLS V5S2T , Vespa 50 PK XL V5X3T , Vespa 50 PK XL Elestart V5X3T , Vespa 50 RUSH V5X4T , Vespa 50 Potenziata (HP) V5N1T , Vespa 50 N (FL) V5X5T