Description High-end tuning made in Italy: Polini Crankshaft Evolution P.R.E. 70cc Piaggio Zip, with 25mm journals and 85mm connecting rod (39.9mm stroke).Polini introduced their outstanding P.R.E. racing kit (Polini Racing Engine), and this is the Crankshaft P.R.E. 70cc Piaggio Zip to go with it. The crankshaft was specifically designed for the 70cc high-end racing cylinders, with standard (39.9mm) stroke and 85mm connecting rod. The full-circle crankshaft is equipped with counterweight inserts and comes with a reinforced connecting rod. The variator-side spline is smooth (16mm). Also included is a 12x17x15mm small end bearing, the main bearings and oil seals are not included, though. standard 39.9mm stroke 85mm connecting rod for 12mm piston pin 25mm journals (6205 bearings) Questions about the product

• Brand: Polini
• SKU: P210.0050
• Availability: In stock

Notes and Safety How to change a crankshaft?The crankshaft is one of the main components of the engine and is responsible for the smooth operation of motorcycle, scooter and moped, whether with two-stroke or four-stroke engine. The longevity of the engine depends not only on the proper condition of the crankshaft, but also on the fact that it is properly mounted.For a correct installation of the crankshaft, we recommend our tutorial: Crankshaft disassembly and assembly.How can I tell if my crankshaft is Damaged?A broken crankshaft causes metallic noises, unusual vibrations, leaking oil seals and drastically reduces the performance of the two-wheeler. In any case, the vehicle must be stopped