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Vespa ET2 Vespa ET4 About Prima: Prima is the industry leader in premium scooter accessories
Bump your Piaggio 4T 50cc scooter to 78
This product is not legal for use in California on pollution-controlled vehicles
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Polini 78.8cc Big Bore Kit | Vespa Piaggio 4T 50cc Engines 1000-1356 Vespa ET2 Vespa ET4 AboutBump your Piaggio 4T 50cc scooter to 78. 8cc with the Polini Big Bore Kit. Designed for 4 stroke 2 valve and 4 valve 49cc Piaggio engines, this complete kit includes a finned aluminum alloy cylinder, flat top piston, full gasket set, and all hardware needed for the bore up. The 11. 6: 1 compression ratio delivers a significant increase in mid range and top end power, and the included gear up ratio (14: 43) provides a 60% increase over stock (11: 54)
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