{"product_id":"kit-cilindro-polini-evolution-hierro-minarelli-vertical-b-12mm","title":"Polini Evolution iron cylinder kit Minarelli Vertical b.12mm","description":"\u003cp\u003e\u003cstrong\u003ePolini cylinder kit\u003c\/strong\u003e Evolution iron \u003cstrong\u003e70cc\u003c\/strong\u003e 12mm pin for \u003cstrong\u003eMinarelli\u003c\/strong\u003e Vertical.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003ePolini Evolution iron 70cc cylinder kit\u003c\/strong\u003e for \u003cstrong\u003evertical Minarelli\u003c\/strong\u003e engines (MBK Booster, Yamaha, etc.) is designed for those seeking a true leap in \u003cstrong\u003eperformance\u003c\/strong\u003e. This version with a 12 mm pin is based on a very solid technical foundation, \u003cstrong\u003eoptimized\u003c\/strong\u003e for competition or demanding \u003cstrong\u003esport use\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAlthough it is a cast iron cylinder, nothing in this kit is conventional. Polini has completely redesigned the thermal group, applying solutions that are usually only seen in high-end engines. The result: \u003cstrong\u003emore power, more torque, and better response\u003c\/strong\u003e throughout the entire rev range.\u003c\/p\u003e\n\u003cp\u003eAmong the key innovations is the \u003cstrong\u003eintegrated reeds box\u003c\/strong\u003e in the cylinder with two exclusive channels that feed the transfers directly, improving engine charge and low RPM thrust. In addition, the kit includes a \u003cstrong\u003e4-petal reeds box\u003c\/strong\u003e, much more effective than the traditional 2-petal ones, and a 360° manifold compatible with Polini CP \u003cstrong\u003ecarburettors\u003c\/strong\u003e from \u003cstrong\u003e17 to 24 mm\u003c\/strong\u003e. This allows you to fit the filter you prefer without space or orientation issues.\u003c\/p\u003e\n\u003cp\u003eWith the \u003cstrong\u003erecommended configuration\u003c\/strong\u003e, this kit can deliver up to \u003cstrong\u003e14 real HP\u003c\/strong\u003e, a figure well above what is usual in iron kits. The torque curve is constant and full, perfect both for acceleration and for maintaining speed on straights.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 39.2 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting rod:\u003c\/strong\u003e 80 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder diameter:\u003c\/strong\u003e 47 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended squish:\u003c\/strong\u003e 1 ± 0.1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition timing:\u003c\/strong\u003e Original\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Spark plug:\u003c\/strong\u003e NGK heat grade 9\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSuggested carburettor setup:\u003c\/strong\u003e\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003ePolini CP 24 carburettor\u003c\/li\u003e\n\u003cli\u003eOpen cone-type air filter\u003c\/li\u003e\n\u003cli\u003eMain jet: 113\u003c\/li\u003e\n\u003cli\u003ePilot jet: 38\u003c\/li\u003e\n\u003cli\u003eSlide: Ø25\/30\u003c\/li\u003e\n\u003cli\u003eNeedle: 14\/22 in 2nd groove\u003c\/li\u003e\n\u003cli\u003eAtomizer: 2.7\u003c\/li\u003e\n\u003cli\u003eFloat: 5 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended parts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePolini CP carburettor from 19 to 24 mm (ideally the 24 with open cone-type filter)\u003c\/li\u003e\n\u003cli\u003ePolini For Race 4 or Scooter Team exhaust\u003c\/li\u003e\n\u003cli\u003eHigh-Speed transmission or sports variator\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Polini Motori s.p.a.","offers":[{"title":"Default Title","offer_id":54586095600001,"sku":"166.0074\/12E","price":236.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/166.0074_e_1.jpg?v=1754382991","url":"https:\/\/motoscoot.net\/en\/products\/kit-cylinder-polini-evolution-iron-minarelli-vertical-b-12mm","provider":"Motoscoot","version":"1.0","type":"link"}