from what i have heard and what i read the buell ecm is a learning ecm. with that if i put a wide band o2 sensor in will the ecm learn and automatically tune to the new O2 sensor? I have installed a K&N filter,A Jardine F1 pipe,and a breather by-pass. bike runs very strong in the early morning hours and then in the afternoon heat bogs out under 4000 rpm. my assumption is that its really not to far off.on another note my fuel milage has dropped dramatically,in my eyes that sends the messege of a rich condition not a lean condition you would expect with the changes i have made.anybody have some input on this would be greatly appreciated