CN250 / 172MM / 250cc Engine Parts This water cooled engine is used to powers a wide variety of Chinese scooters, Go Kart and Buggies. The CN250 engine may also be known as the GY6-250 and CF250. It was originally designed and produced by Honda under the name Helix CN250. It’s now produced by many Chinese manufactures like Jonway, CF Moto, Roketa, Kaitong, JM Star, KinRoad and just about every other Chinese manufactures you can think of.