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Vespa V5A Basic Performance Kit Includes:-140.0053-R Polini 75cc Cylinder Kit-PE10 Polini Performance Exhaust 75cc Polini Cylinder kit. Top of the line Polini pipe gives good looks and great performance via internal baffle system. Adds style and speed to your small frame. 75cc Polini cylinder kit This cast-iron kit has more power in the midrange and lower end than the Malossi, and is a great all-around cylinder. Highly recommended, especially for touring. This kit will fit on all Vespa 50 Special and PK50 scooters, and also post-1965 Vespa 90. We recommend upgrading your gearing on 50cc engines at the same time. As always, you MUST tune your carb and up jet to ensure maximum performance and protection of your top end. All running in methods should be applied. For jetting assistance, see our blog.