Description
Polini cylinder kit 158cc Yamaha Cygnus
Polini offers a tuning cylinder for Yamaha Cygnus 125 with a displacement increase to 158.3cc.
With a compression ratio of 11.1:1, Polini promises an increase in power and maximum torque, which enables acceleration and pull especially at low rpm.
This cylinder kit fits perfectly on the original crankcase without the need for any modifications. The original cylinder head can still be used.
The kit is supplied with an ECU module (CDI), which is essential for smooth operation and reliability.
Pro tip: To get the best out of this cylinder kit, you should adjust the CVT rollers. A tuning exhaust can also release some extra power.
How to Install a cylinder on a scooter, motorcycle or moped
The cylinder or cylinder kit is the heart of the engine on scooters, motorcycles and mopeds. It consists of a cylinder, a piston with piston ring(s), a cylinder head and gaskets needed for installation.
The service life of a cylinder depends on whether it has been fitted correctly.
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.
Aluminium cylinders
Aluminium cylinders are more powerful than cast iron cylinders, but require more regular maintenance and must be combined with different components such as a reinforced crankshaft and a larger carburetor.
How to run in an aluminium cylinder?
Aluminium cylinders should be run in for about 200 kilometers , and you should use a fully synthetic engine oil.
Note: To ensure optimum performance and reliability, it is advisable to measure the squish clearance. Just have a look at our tutorial How to adjust squish clearance.
