At www.ntjl.com you can find the most reliable, easiest-to-install 4 stroke bicycle engine kits. We offer 31cc and 49cc 4 stroke bike motor kit, and the mounting kits only for your other 4 stroke gasoline engine which idle at home. As one of Jiali's multiple product series, bicycle engine kits series enjoy a relatively high recognition in the market. Jiali has professional production workshops and great production technology. bicycle engine kits we produce, in line with the national quality inspection standards, has reasonable structure, stable performance, good safety, and high reliability. It is also available in a wide range of types and specifications. Customers' diverse needs can be fully fulfilled.