Motorcycle Engine (Engine for Motorcycle)(Motor)(Engine) / Engine in China/Motor in China Main Parameter for SS110: Engine Specific: single cylinder/ four strokes/ignition/horizontal Bore*Stroke: 52.4mm*49.5mm Displacement: 110mL Compress Ratio: 9:1:1 Rated Power: 4.5kw/7500±375rpm Max. Power: 5.0kw/8000±400rpm Max. Torque: 7.2N.m/6000±300rpm Idle Speed: 1500±100r/min Manufacturer: Chongqing Shuangshi Motor Manufacturing Co.,Ltd http://motors.ec51.com