Motorcycle Engine (Engine for Motorcycle)(Motor)(Engine) / Engine in China/Motor in China Main Parameter for SS125 (125VI): Engine Specific:single cylinder/ four strokes/ignition/stand style Bore*Stroke: 56.5mm/49.5mm Displacement: 125mL Compress Ratio: 9:0:1 Rated Power: 6.5kw/8500±425rpm Max. Power: 7.5kw/9500±475rpm Max. Torque: 7.6N.m/7500±375rpm Idle Speed: 1500±100r/min Manufacturer: Chongqing Shuangshi Motor Manufacturing Co.,Ltd http://motors.ec51.com