Primary transmission Z 16/37 - Piaggio Diesis / Free / Zip 50 2T AIR (model '00) / Vespa Sprint 50 2T - Polini

Primary transmission Z 16/37 Polini for the following applications: Piaggio Diesis / Free / Zip 50 2T AIR (model 2000) / Zip 50 2T SP H2O (2001) / Vespa Sprint 50 2T.

- Number of teeth on sprockets: 16/37.