MRP 300cc CN PISTON FORGED HIGH PERFORMANCE BUMB ALUMINUM FINISH 75.5MM BORE , COMPRESION RATION 13:1 Require High octane fuel (picture is for PISTON ONLY) FORGED MRP PISTON OFFERS MORE PERFORMANCE AND TOP END SPEED FOR YOUR CF MOTO V3 OR V5 MULTIPLE APPLICATIONS FOR SCOOTERS FEATURING CN250 HONDA ENGINE BUGGIES AND GO KARTS INCLUDING KINROAD 250, JOYNER 250, BMS - CN COPY 250, CMS 250cc, JONWAY 250cc, REDSTREAK 250, AND MORE Works on multiple CN - CF 250cc Applications for Honda Clones 250cc 4-stroke CN250 water-cooled 172mm engines he motor designed and modeled after the Honda CN250 water-cooled Honda Helix engine PISTON MADE IN THE USA RINGS MADE IN JAPAN