Linhai of China has been manufacturing engines for Yamaha for more than 7 years. They have worked with Yamaha to develop new products sold world wide. Yamaha owns a small percentage of Linhai and keeps QC and engineering staff on site to assist Linhai in the development of it's new engines and products. Linhai has learned a lot about product development and building quality products from their dealings with Yamaha. They are now the second most common scooter brand in China behind only CF Moto. It is because of their abilities to develop and build quality products that they now build models for the US market. The Linhai name means that with regular maintenance, these products will go for many years without needing major service. The higher the quality and more reliable a motor vehicle version is, the more it will cost.