POLINI 115 cc CYLINDER KIT - VESPA 50 - APE 50

This Polini cast iron cylinder with a 57.5 mm diameter piston and 115 cc displacement is interchangeable with the original cylinder fitted on Vespa 50 N, 50 L (Lusso), 50 R (Rinnovata), 50 Special, 50 Revival, 50 PK, 50 PK S, 50 PK XL and Ape 50.

Compared to the standard cylinder, this kit features revised transfer ports, designed to provide improved engine responsiveness and a more lively throttle response, with an output of approximately 9.8 hp.

Vespa 50 and Ape 50 are originally equipped with a 43 mm stroke crankshaft, and this kit can be installed without replacing the original crankshaft.

The cylinder is supplied complete with cylinder head and gaskets, ready for installation, and does not require specific technical skills, making installation simple and accessible.

To achieve even higher performance, it is possible to combine the kit with a racing crankshaft.

The main features of this cylinder kit are high torque output and controlled fuel consumption.

Polini machining ensures robustness and reliability, guaranteeing consistent performance and effective operation across all engine speed ranges.

Basic carburetion guidelines:

PHBL 24: main jet 100 – idle jet 64 – atomizer AQ264 – needle D22 – slide 40 – starter jet 60
SHB 19.19: main jet 75 – idle jet 50 – slide no. 1 – starter jet 45
SHB 16.16: main jet 78 – idle jet 50 – slide no. 2 – starter jet 42

Further improvements can be achieved by combining a larger carburetor, variable-advance electronic ignition, longer gear ratios, a reinforced clutch and a suitable exhaust system, depending on the desired setup.

For any information or support in choosing the most suitable configuration, the Emporio dello Scooter customer service is always available.

This product is intended for racing and sporting use and is not homologated for use on public roads.