Types: single cylinder, natural air cooling, 2-stroke Displacement: 49ml Cylinder diameter X stroke: 40 X 39.2 mm Rated power and relevant rotating speed: 1.7/5500 kW/(r/min) Maximum torque and relevant rotating speed: 3.7/4500 N.m/(r/min) minimum idle stable rotating speed: r/min 1700+-170 Ignition mode: CDI Starting type: electric starting Lubricating type: separated lubrication Clutch type: single auto clutch