Hoca GY6 Ceramic Big Bore Kit, Part #169-278
Hoca 63mm Ceramic Big Bore Kit with Nikasil Cylinder Coating for 150cc and 125cc GY6 4-stroke engines and engine based vehicles. * Some crankcase modification may be required. Bore: 63mm. Overall Height (cylinder): 92mm. Heat Resistant Ceramic Coating. Nikasil Interior for Reduced Friction and Low Wear.