{"product_id":"polini-primary-gear-set-yamaha-zuma-4t-50cc","title":"Polini Primary Up-Gear Kit - Yamaha Zuma 4T 50cc","description":"\u003cp\u003eUpgrade or replace the primary transmission on your Yamaha Zuma 4T 50cc with this \u003cstrong\u003ePolini Primary Gear Set\u003c\/strong\u003e (202.1406). Includes a 16-tooth helical-cut primary drive shaft and a 51-tooth spur-cut crown wheel with a splined bore, both in polished and phosphate-finished high-strength steel alloy.\u003c\/p\u003e\u003cp\u003eThe Z=16\/51 ratio replaces the stock factory primary gears and allows the engine to pull taller gearing for increased top speed once sufficient power is available. Precision-machined to tighter tolerances than standard OEM parts for improved durability and smoother engagement.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e16T Helical-Cut Primary Drive Shaft and 51T Spur-Cut Crown Wheel — Z=16\/51 Ratio\u003c\/li\u003e\n\u003cli\u003eHigh-Strength Steel Alloy — Tighter Tolerances Than OEM for Improved Durability\u003c\/li\u003e\n\u003cli\u003eTaller Gear Ratio Allows Higher Top Speed Potential vs. Stock Gearing\u003c\/li\u003e\n\u003cli\u003ePolished and Phosphate-Finished Surfaces for Smooth Engagement and Wear Resistance\u003c\/li\u003e\n\u003cli\u003eDirect Replacement for Yamaha Zuma 4T 50cc Primary Transmission | Polini P\/N 202.1406\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1200-1228\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolini P\/N:\u003c\/strong\u003e 202.1406\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Type:\u003c\/strong\u003e Primary transmission set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRatio:\u003c\/strong\u003e Z=16\/51 (16T drive shaft \/ 51T crown wheel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Shaft:\u003c\/strong\u003e Helical-cut, polished steel, long splined shaft with stepped journal ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrown Wheel:\u003c\/strong\u003e Spur-cut, splined bore, phosphate finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-strength steel alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eYamaha Zuma 4T 50cc (Minarelli-Yamaha 4-stroke liquid-cooled engine)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":67964621586753,"sku":"1200-1228","price":110.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-9528-0-1200-1228_7468770c-235b-4368-ab00-592d37b50375.jpg?v=1792558011","url":"https:\/\/azscooterparts.com\/products\/polini-primary-gear-set-yamaha-zuma-4t-50cc","provider":"AZScooterParts","version":"1.0","type":"link"}