{"product_id":"primary-gears-polini-13-40-piaggio-nrg-after-1998-p202-1378","title":"Primary Gears Polini 13\/40 Piaggio NRG after 1998","description":"\u003cp\u003eDescription A higher gear ratio will increase top speed. Only recommended for tuning \/ racing cylinders. OEM cylinders usually don't have enough power to pull this kind of transmission.Gear ratio: 13\/40 (3.07) =\u0026gt; +13.3% Shaft diameter = 17.7mmNote: Piaggio changed their transmissions in 1996. The intermediate shaft between primary and secondary shaft was 18.0mm before 1996 and was changed to 17.7mm after 1996. In case you're not certain - please check the measurements! This transmission is for models after 1996 with 17.7mm shaft. Questions about the product\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Polini\u003c\/li\u003e\n\u003cli\u003eSKU: P202.1378\u003c\/li\u003e\n\u003cli\u003eAvailability: In stock\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNotes 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!\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":53460639678807,"sku":"P202.1378","price":138.6,"currency_code":"PLN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/4027\/5287\/files\/282507_2953476.jpg?v=1777829767","url":"https:\/\/mattmoto.pl\/en\/products\/primary-gears-polini-13-40-piaggio-nrg-after-1998-p202-1378","provider":"MattMoto Skutery","version":"1.0","type":"link"}