GY6 59mm, 61mm piston big bore upgrades

Been selling these for a couple of years. GY6 Air Cooled are based on the older 2003 Honda engines that never quite made it to America under the Honda name, but are all over their joint ventures in Asia which started with the 125cc version which was copied and adapted. The standard GY6 first made it to the US with Vento the now defunct importer out of California. The original Vento GY6 Air cooled back in 2003-2004 actually featured a 52mm engine ( 125cc ) despite being called a 150cc. We sell 52mm pistons for these. You can go up to 58mm without boring the case in 90% of the standard long and short case GY6 A type engines. Some will go as high as 58.5 and 59mm so thats why we sell so many of these upgrades. At MRP we have them all from 52mm all the way to 64mm. http://www.mrp-speed.com

PISTONS FOR 150cc and 125cc GY6 QMI152/157 QMJ152/157 4-stroke engines Lifan, United Motors, Matrix 150, Verucci, Qingqi, X-Treme, TGB, Vento, SUNL, Various unlisted makes/models, Tank, Vento Phantom, Strada, Wildfire, Baron, Diamo, Boss, Bravo, Baja SC125, Baja, Honda, Schwinn, Eton, Boreem (BMS), Tank Racer-150/150T-7, Tank Racer-150DE /150T-7A, Tank Racer-150DS/150T-7B, CFMoto, Redcat, Baja SC150, SYM, Kymco, Bashan, Avanti, Dotera, Yamati , YongKang, Baotian, Vento Sauron, ZNEN