Description
Cylinder Kit Polini Evolution w/ reed valve 152cc, Vespa 50 Special / Primavera 125cc ET3, d=60mm, 54mm stroke.
Polini is one of the big names in 50cc scooter tuning, and is also one of the leading manufacturers of tuning parts for Vespa, modern and vintage. Cylinders, intake manifolds, exhausts, air filters, carburetors, crankshafts and more - everything you need to boost the performance of your Vespa.
This is the Polini Evolution cylinder with reed valve supported intake. The large reed valve with 0.4mm petals and the intake manifold are designed for use with 34mm carburetors and ensure that cylinder filling is optimal at all times. The cylinder with divided exhaust port is an enhanced development of the Evolution 133, with a 60mm bore and a displacement of 152cc. This means that you can reach 30 hp on the condition you add the right components. The cylinder sets new standards for road or race track.
- Displacement: 152cc
- Bore: 60mm
- Stroke: 54mm
- Compression: 14.2:1
- Exhaust port timing: 194°
- Milling on crankcase left side: 89.5 x 22.4mm
- Milling on crankcase right side: 89.5 x 15.8mm
For Vespa 50 Special / PK / Primavera 125cc ET3
Note: The crankcase must be milled open to fit the cylinder, and you’ll have to use a crankshaft with 54mm stroke / 105mm connecting rod.
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: High End 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.
High End Racing products are exclusively designed for racing and should only be handled by tuning pros with the appropriate technical know-how. High-end racing parts often require modifications or machining of certain elements to accommodate the often larger components (larger crank webs, larger intake, etc.). Whether you stick with 50cc or increase the displacement, high-end racing parts offer much higher performance than the original parts and are the most powerful tuning parts.
Note: To ensure the reliability of the engine, it is important that the parts are compatible and that you do regular maintenance on your two-wheeler.
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.
Cylinder Polini Evolution w/ reed valve 152cc, Vespa 50 Special / Primavera 125cc ET3, d=60mm, 54mm stroke | |
---|---|
Article no. | P140.0227 |
EAN | 8054705118166 |
Weight | 3,24 kg |
Series | Evolution |
Brand | Polini |
Product type | Cylinder kit |
Tuning level | High-end |
Displacement | 152cc |
Piston pin | 15 mm |
Cylinder material | Aluminium |
Bore | 60 mm |
Stroke | 54 mm |