I have been looking at a few controllers and they all seem to only go back to 01? What is so different about the 2000 Road King EFI from the new EFI's??Sure would be compatible as long as you get the one for your bike.
EFI - Electronic Fuel Injection Controllers - ATVs, UTVs, Motorcycles, Snowmobiles, Scooters, Sport Bikes, Watercraft