Primary Transmission Z 10/14/17/20 - Vespa ETS 125 AIR 2T ('84-'85) / PK 50 AIR 2T ('83-'89) / V 50 AIR 2T ('65-'79) - Polini

Primary transmission Z 10/14/17/20 Polini for the following applications: Vespa ETS 125 AIR 2T (1984-1985) / PK 125 AIR 2T (1983-1989) / PK 125 S AIR 2T (1983-1989) / PK 125 XL AIR 2T (1986-1989) / PK 50 AIR 2T (1983-1989) / PK 50 FL AIR 2T (1990-1996) / PK 50 XL AIR 2T (1986-1989) / Primavera ET3 125 AIR 2T (1967-1983) / Special 50 AIR 2T (1974-1979) / SS 50 AIR 2T (1965-1971) / V 50 AIR 2T (1965-1979).

- Polini engineers have designed a new primary shaft with close-ratio gears;
- This feature allows for reduced RPM during shifting;
- The optimization of the teeth allows interchangeability with original secondary transmissions;
- It is made from high-quality steel and undergoes next-generation heat treatment;
- 100% made in Italy;
- Number of teeth on gears: 10/14/17/20.