ATV, Dirt Bike, Pocket Bike, Engine/Motor, Motorcycle, Gasoline Generator, Water Pump,Tillage Machine in China. Chongqing Shuangshi Motor Manufacturing Co., Ltd is a large manufacturer of ATV, scooter,motorcycles,dirt bike, and engines in Chongqing, China. We manufacture mainly motorcycles (dirt bike, pocket bike, race bike, scooter,ATV), engines(50cc,70cc,90cc,100cc,110cc,125cc,150cc,etc), gasoline generator, water pump, tillage machine,farm machine,etc. ATV: 50cc ~ 250cc: One of our speciality is our ATV 150cc,200cc has Shaft Drive or Chain Drive for your choise. We got ISO9001:2000 and CCC(China Compulsory Certificate). Chongqing Shuangshi Motor Manufacturing Co., Ltd is a large enterprise being transformed from soldiery to private one that was under the Chinese Ordnance Equipment Group. It is one of the main motorcycle manufacturers in Chongqing and the public motorcycles manufacturing enterprise. Producing the "SHUANGSHI" motorcycle have been in customers good graces since 1979.And also it is the first maker of Shuangshi-90CC in Chinese motorcycle line. We have one motorcycle research institute and 7 branch factories that are specialized in researching, exploiting, manufacturing and selling of motorcycle and engine. The company is located in Shuangshi Industrial Zone in Banan district that covers an area of 110 mu. It owns the modern workplace of 30000 m2. We have different kinks of modern and advanced scientific and technical personnel; The company has now become a high and new technological enterprise, integrating scientific research, production and trade into one body. The Engine Branch Factory has 3 modern assembly lines that can produce motorcycles engines over 1000,000 sets (displacement: 48ml-150ml) annually. The Unit Motorcycle Factory possesses 2 modern assembly lines that can produce 600 thousand sets of motorcycles annually. We get the certificates of ISO9001: 2000 Quality System