This high quality 177cc cylinder kit for 125cc and 150cc GY6 engines is from NCY The 177.5cc/62 mm ceramic kit without head features a ceramic coating which allows the engine to run at a much higher RPM than normal 30 Day Warranty Description This high quality 177cc cylinder kit for 125cc and 150cc GY6 engines is from NCY. The 177.5cc/62 mm ceramic kit without head features a ceramic coating which allows the engine to run at a much higher RPM than normal. Note: This is not a bolt on item for most GY6125/150 engines, and you may have to have your engine case cut. Let Monster Scooter Parts be your source for NCY scooter parts and accessories. 1100-1014