If you are running in ethanol mode, your mapping would be richer. With a partial tank of ethanol, that also has a little oil in it (yes oil in the tank actually creates less fuel to air ratio) would make for a little leaner fuel supply. I would not be in a hurry to lean the mapping. I would wait until the next tank of fuel and a few more miles. There are many opinions out there; this is just mine! Have a great ride!
