... constant voltage(AVR)Starting system12V electric starterEngine modelYM186FEEngine typeSingle cylinder, 4-stroke, air-cooled, direct injection, ... -phase rectifying bridge (PWM)Insulation gradeFPole number2Engine typesingle cylinder, four-stroke, air-cooledDisplacement (ml)418Operating Noise level ... new and high quality products. Each and every unit is strictly factory tested before shipment.2.Quality ...