Description Polini extended primary Transmission 14/35 Piaggio Zip Euro 4 / 5Polini primary gearbox, especially for Piaggio Zip 50 4T 3V Euro 4 and Euro 5 scooters. The extended ratio of 14/35 instead of the original 11/54 provides significantly more top speed.The gears are made of high-strength special steel and offer increased resistance to wear and mechanical stress. Ideal for anyone who wants more power without sacrificing reliability.Advantages of Polini gear ratio 14/35:Extended gear ratio: Increase top speed by up to 60%*High quality: Made from special steel, robust and durableTo achieve maximum performance, we recommend the use of a tuning cylinder, tuning CVT and performance exhaust.* Note: The speed increase of 60% is only achieved by combining this transmission with the Polini cylinder no. P140.0223.Compatibility:Piaggio Zip 50 4T 3V Euro 4 (2018-2020)Piaggio Zip 50 4T 3V Euro 5 (from 2021) Questions about the product Downloads and Media Installation guide

• Brand: Polini
• SKU: P202.1429
• Availability: In stock

Notes and Safety Scooter gearboxThe transmission of scooters and some mopeds is located in a case behind the clutch and torque driver and has the function of reducing rpm and ultimately driving the wheel axle.The transmission of a scooter has a direct influence on top speed. If the engine develops enough power and torque at low rpm, you can choose a longer gear ratio to achieve a higher top speed without any noticeable loss in acceleration.Please note: if you don't have a press, better choose pre-assembled gears!