... very popular in China. It may fit most of Chinese 50cc scooters. This engine is first produced by Honda and KYMCO ... , 90, 110. Kymco ATV Mongoose 50, 70, 90.50/90/100cc with engine of Honda, Piaggio, PGO, Kymco, SYM… Gilera Runner ... 2, Suzuki Katana 50 2t, SYM DD 50. Many Chinese 50cc scooter like QINGQI,QJMOTOR, LIFAN,ZONGSHEN, XINGYUE, WANGYE,JONGWAY, etc ...