{"product_id":"polini-primary-up-gear-kit-for-yamaha-zuma-4t-50cc","title":"Polini Primary Up-Gear Kit for Yamaha Zuma 4T 50cc","description":"\u003ch2\u003ePolini Primary Gear Set for Yamaha Zuma 4T 50cc\u003c\/h2\u003e\u003cp\u003eThis Polini primary gear set is made to match the Yamaha Zuma 4T 50cc. It uses a 16-tooth helical drive shaft paired with a 51-tooth spur-cut crown wheel. With this set, the gearing is raised, which can help top speed when the engine has enough power to use it. It is one of the \u003ca href=\"\/collections\/yamaha-zuma-parts\"\u003eYamaha Zuma scooter parts\u003c\/a\u003e you can fit to change how your scooter rides.\u003c\/p\u003e\u003ch3\u003eConstruction Details\u003c\/h3\u003e\u003cp\u003eThe primary drive shaft is polished and built from high-strength steel alloy. It has a long splined shaft with stepped journal sections so it seats securely. The crown wheel is spur-cut, has a splined bore, and carries a phosphate finish for lasting wear and quiet, even running.\u003c\/p\u003e\u003ch3\u003ePerformance Improvements\u003c\/h3\u003e\u003cp\u003eThis set takes the place of the stock primary gears and provides a Z=16\/51 ratio, allowing the engine to work with higher gearing. Machining is precise, giving tighter tolerances than standard OEM parts, which contributes to durability and smoother engagement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolini Part Number:\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrown Wheel:\u003c\/strong\u003e Spur-cut, 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\u003eFits:\u003c\/strong\u003e Yamaha Zuma 4T 50cc (Minarelli-Yamaha 4-stroke liquid-cooled engine)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eYamaha Zuma 4T 50cc (Minarelli-Yamaha 4-stroke liquid-cooled engine)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/yamaha-zuma-parts\"\u003eYamaha Zuma Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/yamaha-scooter-parts\"\u003eYamaha Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-transmission\"\u003eScooter Transmission \u0026amp; Final Drive\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51137966243897,"sku":"TT-24280","price":106.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/polini-primary-up-gear-kit-for-yamaha-zuma-4t-50cc-1.jpg?v=1794370295","url":"https:\/\/www.trendtimes.com\/products\/polini-primary-up-gear-kit-for-yamaha-zuma-4t-50cc","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}