POLINI Vespa Cast Iron 177 Cylinder Kit PX, Cosa, LML, Super, SprintPOLINI Vespa Cast Iron 177 Cylinder Kit PX, Cosa, LML, Super, Sprint The Polini is the classic racing cylinder for the PX and Sprint 3 Port engines. A very early high torque makes it an allround cylinder for almost all needs. It is ideal for the so called "plug in tuning", i. e. simply changing the cylinder without modifying the rest of the engine. cast iron 7 ports 63,0mm stroke 57mm 2 piston ring(s) with cylinder head Comparison No. 140. 0080