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50cc Bike
Article no.: P204.0730

Polini Piston "Corsa" 70cc Morini

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.


Polini Piston "Corsa" 70cc Morini, spare piston for Polini Corsa / Racing 70cc cylinder for Morini engines. We carry a huge selection of tuning and spare parts by Polini, well-known scooter and moped expert from Bergamo in Northern Italy.

  • for Polini Corsa 70cc
  • 47mm bore
  • fits Morini
Questions about the product
Notes and Safety

Polini Corsa

With the Corsa cylinder series from Polini, the name says it all, because Corsa means racing. The Corsa is a cast iron racing cylinder for 50cc scooters, known for its excellent ratio of reliability and performance. The Corsa has been around for a very long time and still has many friends and fans.

Advantages of the Polini Corsa

  • Cast iron cylinder - easy installation, no squish adjustment
  • Durable 2-ring piston for everyday use
  • High performance
  • Carbon reed petals included
  • HC cylinder head

To make full use of the Corsa's performance, it should be combined with a racing exhaust and a well-adjusted carburetor with a large diameter. Readjusting the CVT is also recommended.

When to replace the piston?

To find out when the piston on your motorcycle, scooter or moped needs to be replaced, it's best to check your bike's manual. You can also keep an eye out for certain symptoms such as loss of compression, loss of power or oil consumption (only for a four-stroke piston).

Extending Piston life

To extend the life of the piston and reduce cylinder wear, it is recommended that you replace the piston rings on an alternating basis. This method maximizes piston life and improves engine performance.

It is important that you replace cylinder gaskets and piston circlips each time you disassemble the cylinder and piston. Failure to do so can result in oil leaks and engine damage.

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.

Technical details
Polini Piston "Corsa" 70cc Morini
Article no.P204.0730
Weight0,13 kg
Product typePiston
Tuning levelRacing
Piston pin10 mm
Cylinder materialCast Iron
Bore47 mm
Conrod lengthStandard
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