Crankshaft Evolution (stroke 51mm / piston pin 15mm) - Polini

Crankshaft Evolution (51mm / 15mm) 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) / Primavera ET3 125 AIR 2T (1967-1983).

Technical specifications:
- Small needle bearing included (15x19x20 mm);
- Connecting rod: 97 mm;
- Stroke: 51 mm;
- Piston pin: 15 mm;
- Class: Race;
- Type: Evolution.