Wuyi Koshine Motion Apparatus Co., Ltd.Started since 2003, is a manufacturer of dirt bike, engine, ATV with well-equipped testing equipment and strong technical force.With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in dirt bike and other industries. we are the special making the two stroke bikes and engine for the 50cc kick start engine,and we are now the only one in China who made this kind of engine expenrienced for 7year for this ...