{"product_id":"bhir-1151412","title":"POLIN CYLINDER FOR RACE","description":"\u003cp\u003ePolini 70 Evolution Cylinder Kit\u003c\/p\u003e\u003cp\u003eOverview\u003c\/p\u003e\u003cp\u003eThe Polini 70 Evolution Cylinder Kit is the most advanced tuning kit for MBK Booster and Yamaha Minarelli Vertical engines. Completely redesigned, it brings a new level of performance to this engine type. Thanks to exclusive engineering solutions never seen before on similar engines, it delivers maximum power, efficiency, and reliability.\u003c\/p\u003e\u003cp\u003eTechnical Innovations\u003c\/p\u003e\u003cp\u003eThe cylinder has been developed using advanced fluid-dynamic design to maximize airflow efficiency and torque delivery across the entire rev range.\u003c\/p\u003e\u003cp\u003eIntegrated reed valve housing with two dedicated ducts feeding directly into the transfer ports – an exclusive solution that improves torque and throttle response at low RPM.\u003c\/p\u003e\u003cp\u003eFour-petal reed valve (instead of the conventional two-petal design) supplied in the kit for faster and more efficient air\/fuel mixture flow.\u003c\/p\u003e\u003cp\u003eDedicated flow guide to channel air between the manifold and the reed valve, reducing turbulence and loss of pressure.\u003c\/p\u003e\u003cp\u003e360° rotatable intake manifold, compatible with Polini CP carburetors (17–24 mm), offering full installation flexibility – suitable for both OEM and open air filters.\u003c\/p\u003e\u003cp\u003eRacing head with copper gasket, dual-ring piston, and base gaskets of 0.2 mm and 0.3 mm to fine-tune the squish clearance.\u003c\/p\u003e\u003cp\u003eAvailable Versions\u003c\/p\u003e\u003cp\u003e166.0074\/E – with 10 mm piston pin\u003c\/p\u003e\u003cp\u003e166.0074\/12E – with 12 mm piston pin\u003c\/p\u003e\u003cp\u003ePerformance\u003c\/p\u003e\u003cp\u003eIn its basic setup, the Polini 70 Evolution Cylinder Kit delivers around 14 real horsepower with a strong and consistent torque curve across the rev range – a major improvement compared to traditional 70 cc cast-iron cylinders.\u003c\/p\u003e\u003cp\u003eRecommended Components for Maximum Performance\u003c\/p\u003e\u003cp\u003ePolini CP carburetor (19–24 mm)\u003c\/p\u003e\u003cp\u003ePolini For Race or Scooter Team exhaust system\u003c\/p\u003e\u003cp\u003eHigh-speed transmission\u003c\/p\u003e\u003cp\u003ePart numbers: 166.0074\/E  |  166.0074\/12E\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eAPRILIA: AMICO 50 - SR 50 2T mod.1993\u003c\/p\u003e\u003cp\u003eITALJET: BAZOOKA 1 50 - PISTA 50 1\/2, YANKEE, SCOOP 2\/3\u003c\/p\u003e\u003cp\u003eMBK: BOOSTER 50 - BOOSTER 50 dal 2004 -\u0026gt; - BOOSTER 50 NEXT GENERATION - BOOSTER 50 R, ROCKET - BOOSTER 50 SPIRIT - BOOSTER 50 TRACK - STUNT 50\u003c\/p\u003e\u003cp\u003eYAMAHA: BW'S 50 dal 2004-\u0026gt; - BW'S 50 NEXT GENERATION - BW'S 50 ZUMA - SLIDER 50 - SPY 50\u003c\/p\u003e","brand":"POLINI","offers":[{"title":"Default Title","offer_id":58185526083932,"sku":"1151412","price":429.17,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/5072\/8284\/files\/800Wx800H-1151412-1.jpg?v=1783066013","url":"https:\/\/checkout.xparts.weostores.com\/products\/bhir-1151412","provider":"xparts","version":"1.0","type":"link"}