{"product_id":"cylinder-kit-polini-evolution-p-r-e-4-70cc-piaggio","title":"Cylinder kit Polini Evolution P.R.E 4 70cc (Piaggio)","description":"\u003cp\u003eThe Polini Evolution P.R.E. 4 – 70cc Cylinder Kit is an extreme racing cylinder kit designed for Piaggio 2-stroke engines.\u003c\/p\u003e\n\u003cp\u003eThis cylinder is designed for:\u003c\/p\u003e\n\u003cp\u003e- High RPM\u003cbr\u003e- Maximum power\u003cbr\u003e- Track\/drag\/running use\u003c\/p\u003e\n\u003cp\u003eP.R.E. 4 technology is based on an ultra-aggressive transfer port design, a very high port timing, and tight tolerances, resulting in a complete and consistent engine configuration.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cp\u003eBore (mm): 47.6\u003cbr\u003eStroke (mm): 39.3\u003cbr\u003eDisplacement (cc): 69.9\u003cbr\u003ePiston pin (mm): 13\u003c\/p\u003e\n\u003cp\u003eSquish (mm): 0.45\u003cbr\u003eConnecting rod length (mm): 90\u003cbr\u003eRing ring tolerance (mm): 0.2-0.25\u003cbr\u003ePiston-to-cylinder clearance (mm): 0.05-0.06\u003cbr\u003eCompression ratio: 16.5\u003cbr\u003eTightening torque - cylinder M7 (Nm): 14\u003cbr\u003eTightening torque - cylinder head M7 (Nm): 14\u003cbr\u003eTightening torque - cylinder head M5 (Nm): 8\u003cbr\u003eKart track fuel mixture percentage: 3.50%\u003cbr\u003eRace track fuel mixture percentage: 4%\u003cbr\u003eOptimal operating temperature (°C): 50-55\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":45178861912243,"sku":"140.0239","price":699.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0518\/6057\/0291\/files\/Cylinder_Kit_Polini_Evolution_P.R.E._4_70cc_2T_Piaggio_140.0239_PRE_4_D.47_6_CYLINDER_KIT.jpg?v=1770241322","url":"https:\/\/secretimport.com\/en\/products\/cylinder-kit-polini-evolution-p-r-e-4-70cc-piaggio","provider":"Secret Import ","version":"1.0","type":"link"}