Description
Polini For Race crankshaft
Reinforced racing crankshaft from Polini. The reinforced CNC-milled connecting rod makes it particularly suitable for tuned engines. Although a Mid-Race / Sport application is recommended, this crankshaft can also be used for more powerful racing setups up to 70cc. It is suitable for all sport and racing cylinders with a power output of up to 14 hp.
With small end bearing for 12mm piston pins.
Technical data Polini For Race crankshaft:
- For piston pin: 12mm
- Stroke: Original
- Connecting rod: reinforced, CNC-milled
- Suitable for original and tuned setups (Sport / Midrace)
- For Minarelli AM6 (Beta RR, Rieju MRT, Sherco SM and many more)
Polini For Race
The For Race series from Polini includes exhausts as well as crankshafts and clutches for scooters, 50cc supermotos and Vespas. Although the name sounds like ultra-high-quality and high-performance racing parts, this is not quite true.
The exhausts are not road-legal and are theoretically only intended for use on the race track, but due to their performance, which focuses mainly in the lower and medium RPM range, they are more suitable for sports / entry level tuning setups, which are appreciated for their balanced ratio of performance and reliability for everyday use.
The crankshafts are also suitable for sports cylinders, as are the few For Race clutches.
Polini fans looking for maximum power for the racetrack should therefore opt for the Evolution or even the P.R.E. series.
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.