Description
Polini Crankshaft 60mm stroke Vespa PX 125 - 150cc, long stroke crankshaft with reinforced connecting rod and extremely hard-wearing small end + big end bearings.
A longer stroke translates into more power, which is what you want in an already powerful engine. Particularly recommended if you're upgrading your scooter with a larger displacement cylinder. This HQ crankshaft features excellent manufacturing quality and premium quality materials.
Spare parts such as seals and bearings by Polini are separately available.
- tuning crankshaft long-stroke
- connecting rod: 105mm
- stroke: 60mm
- for 15mm piston pin
- port timings: 138° / 5° after TDC
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: Sport
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.
The products listed under Sport yield better performance than Original parts. They may have technical differences, such as the use of higher quality materials, a larger displacement or a performance-enhancing design. They are suitable for everyday use and have a long service life.