Crankshaft Polini Evolution Vespa 125 Primavera / ET3, 20mm cone
Sorry, this Item has been Discontinued
This product is no longer being manufactured, so unfortunately we can no longer offer it.
However, we would like to help you find an alternative. Please take a look at other products within the same category or contact us so we can help you with selecting the right product.
Description
High-end tuning by Polini: Crankshaft Polini Evolution Vespa 125 Primavera / ET3, 20mm cone. This is the standard Evolution model for Vespa ET3, same stroke and connecting rod as the original crankshaft. The disc valve type crankshaft was modified for maximum performance, with longer timings leading to improved cylinder filling. Special tungsten weights and balancing bores sealed with resin lead to perfect balancing and minimal vibrations. The connecting rod is reinforced and has small openings for optimum lubrication.
Ideal crankshaft for racing cylinders, by Polini or any other manufacturer.
stroke: 51mm
connecting rod: 97mm
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 immediately to prevent the damage from getting worse.
Please note that whenever the crankshaft is changed and serviced, you'll have to install new crankshaft bearings.
Tuning Level: Racing
We categorize our products into different performance levels Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.
Racing products are designed for a more extreme uses and are developed primarily for racing. Whether you stay at 50cc or increase the displacement, the corresponding Racing parts produce much higher performance than the original parts in order to achieve maximum power.