This CDI ECU is a blackbox ignitor designed for Honda XR500R, XL600L, and XL600R motorcycles with PD03 and PE03 engines. It is a vintage part from Japan that fits specifically on the front of the vehicle. The unit is made of plastic and has a length of 3 inches. It is a performance part that replaces the OEM CDI ECU and has a unit quantity of one. The CDI ECU is compatible with Honda motorcycles from the years 1983-1985 and has a manufacturer part number of CD1604.