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Polini Corsa 70cc big bore cylinder kit for the Honda Dio or Honda Elite scooter Comes complete with new cylinder,cylinder head,gaskets,piston,wrist pin,and clips for wrist pin This is the most popular cylinder out when modifying your Dio Rad polished exhaust port, enlarged scavenger ports, high compression, specially coated pistons, self lubricating chrome and cast piston rings, Periphery, such as exhaust, carburetor and transmission must be modified to get the best performance out of this kit Exact workmanship of POLINI kits guarantees high durability and real power development Made in Italy for the highest quality Technical Specifications cast iron 12mm wrist pin same as stock Dio 47mm bore 10,000-11,000 rpm range 14.4 to 1 compression ratio When installing this kit use at least a 17.5 mm carburetor, sport exhaust,variator and up gear kit to get the most out of your build. 1190077/R 1190077R p1190077/R p1190077R