{"product_id":"polini-corsa-cylinder-kit-horizontal10mm-pin-zuma-50-2t-1100-1486","title":"Polini Corsa 70cc Racing Cylinder Kit: Zuma, RH \u0026 Buddy 50","description":"\u003ch2\u003eMid-Race Performance: Polini Corsa 70cc Iron Cylinder\u003c\/h2\u003e\u003cp\u003eStep up to \"Mid-Race\" power with the \u003cstrong\u003ePolini Corsa Cylinder Kit\u003c\/strong\u003e. While based on the legendary Polini 70cc Sport, the Corsa is factory-tuned with revised port timing and a polished exhaust port to deliver significantly more horsepower and higher RPM ceilings. This cast-iron kit combines the bulletproof reliability of a daily driver with the aggressive acceleration required for the track.\u003c\/p\u003e\u003ch3\u003eTechnical Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Ported:\u003c\/strong\u003e Features hand-finished porting from Polini technicians to optimize scavenging and increase top-end power compared to the standard 70cc Sport kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal-Resistant Cast Iron:\u003c\/strong\u003e Provides a rugged, long-lasting bore that can be honed and oversized if needed, offering better durability for high-heat racing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome-Plated Piston Rings:\u003c\/strong\u003e Includes specialized high-tension rings designed to reduce friction and maintain a perfect seal at high crankshaft speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm Wrist Pin:\u003c\/strong\u003e Engineered specifically for the standard 10mm small-end bearings found on horizontal Minarelli and Genuine 50cc engines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThis kit is designed for \u003cstrong\u003eHorizontal Minarelli-based 2-Stroke\u003c\/strong\u003e engines. It is a direct-fit performance upgrade for:\u003c\/p\u003e\u003ctable style=\"width: 100%; height: 106.969px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"text-align: left; width: 28.8477%; height: 19.5938px;\"\u003eBrand\u003c\/th\u003e\n\u003cth style=\"text-align: left; width: 68.2952%; height: 19.5938px;\"\u003eCompatible 50cc 2-Stroke Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.8477%; height: 19.5938px;\"\u003e\u003cstrong\u003eGenuine Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.2952%; height: 19.5938px;\"\u003eBuddy 50, RoughHouse 50, Rattler 50, Black Jack 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.8477%; height: 19.5938px;\"\u003e\u003cstrong\u003eYamaha\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.2952%; height: 19.5938px;\"\u003eZuma 50 (2002-2011), Vino 50, Jog (Horizontal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.8477%; height: 19.5938px;\"\u003e\u003cstrong\u003eAprilia\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.2952%; height: 19.5938px;\"\u003eSR50 (Pre-2000 Minarelli Engine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 28.5938px;\"\u003e\n\u003ctd style=\"width: 28.8477%; height: 28.5938px;\"\u003e\u003cstrong\u003eMalaguti\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.2952%; height: 28.5938px;\"\u003eF12 Phantom, F15 Firefox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eNote: Not compatible with AF05E engines (pre-1994 model years).\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 70cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter:\u003c\/strong\u003e 47mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrist Pin Size:\u003c\/strong\u003e 10mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Iron Cylinder \/ Aluminum Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Air Cooled\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e The Corsa is a high-revving kit. To prevent engine failure, you \u003cstrong\u003emust\u003c\/strong\u003e increase your oil-to-fuel ratio by adding 1oz of high-quality 2-stroke oil per gallon of gas. Additionally, this kit performs best when paired with at least a \u003cstrong\u003e17.5mm or 19.1mm Carburetor\u003c\/strong\u003e and a mid-race expansion chamber exhaust.\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1100-1486 \u003cbr\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Polini Motori (Italy)\u003c\/p\u003e\u003cp\u003ePolini Corsa big bore (70cc) racing cylinder kit for Genuine Buddy 50, RoughHouse 50, and Rattler 50 scooters, Zuma 50 2T, and other horizontal Minarelli-based engines. Not compatible with \u003cspan\u003eAF05E engines \u003c\/span\u003e\u003cspan\u003e(pre-1994 model years).\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003cspan\u003e It's important to properly break in your big-bore kit for 200-300 miles before running your bike full throttle for any extended length of time. We also recommend adding one ounce of 2-stroke oil to your gas tank; 50cc oil injectors\u003c\/span\u003e\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":46760721088792,"sku":"1100-1486","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/1100-1486_4c6ab654-1ff5-45f0-bedd-9035d65c6cdd.jpg?v=1695314462","url":"https:\/\/www.scooterworks.com\/products\/polini-corsa-cylinder-kit-horizontal10mm-pin-zuma-50-2t-1100-1486","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}