Turn your GY6 125 in to a screaming 155cc with this performance cylinder kit from Ruima. Ruima cylinders (manufactured in Taiwan) are high quality cylinders, with a forged surface. This 58.5mm cylinder is the largest size that can fit on your GY6 152QMI or 157QMJ engines without having to modify your case.
This is a remanufactured unit from Superior Electric. The picture is for visual only. The remanufactured unit has new bearings, rectifier,stator and regulator. This is remanufactured at our place of business.