10-14-18-20 Gran Sport gearbox

Quadruple specific for all engines, strongly recommended for 177cc to be used in mixed routes and in the mountains. Z12-13-16-20 (Third and Fourth Short). Applications: Vespa ETS 125, Vespa ET3 125, Vespa PK 125, Vespa PK 50, Vespa PK HP 50, Vespa PK XL 125, Vespa PK XL 50, Vespa Special 50 4M, Vespa PK HP 50 V, Vespa Primavera 125, Vespa 90 , Vespa 90 SS, Vespa Nuova 125, Ape 50, Ape 50 Transformation 125.