Exactly what does a typical ECM fuel map look like on one of the closed loop Harley-Davidson systems? Here is a chance to take a closer look at a typical emissions controlled fuel map just as HD provides them to their customers. It will give you a lot of insight into the inner working of Harley, EPA requirements and a better idea why Nightrider XiED's are as effective as they are on these bikes. This will show you the critical portions of the ECM fuel, bias and ignition maps for the 103 Stage 2 download and the Stage 1 download. The Stage 2 is the upgrade that includes the SE-255 cams, so it would be considered a mild performance upgrade. The Stage 1 Download is the upgrade Dealers push so hard for riders to get if they upgrade exhaust and air cleaner. Both these upgrades are valid 50-state legal modification.
For Riders with SERT, SEST or TTS, there is nothing new here. For riders that do not have a software tuner, the information can be quite interesting.