Rick's Motorsport Electrics part #10-304 is an OEM Style Aftermarket Kawasaki Rectifier-Regulator for Kawasaki Street Bikes and ATV's. Rick's product is designed to OEM specifications. *If your application lists more than one rectifier-regulator this rectifier-regulator has a 3 place connector as well as a separate bullet connector. Rick's upgraded design eliminates the use of the OE brown wire; the OE piece will have a 3 place connector & two separate bullet connectors. **Please note that the 1980-1981 KZ550A & KZ550 LTD have two possible rectifier-regulators; Rick's 10-304 is for the single phase system. Ricks 10-304 Kawasaki 21066-1014 Kawasaki 21066-029