Primary transmission couple

Vespa 50 , Vespa 50 S V5SA1T , Vespa 50 N V5A1T , Vespa 50 L V5A1T , Vespa 50 R V5A1T , Vespa 50 SS V5SS1T , 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 PK Automatica V5P2T