Genuine OEM CDI unit with a 6 pin plug, will not only help starting but will also produce smooth power delivery, with a good racing ignition advance curve.It will work with kick or electric start engines and has an AC input so will work without a battery as well as with one.Easy to install with no instruction required (plug & play)Please check images against your current part for compatibility, typically used for bikesbetween 50cc and 250cc.