Funny you bring this up, my dealer wants to do this to my bike as I have a pinging issue, but he says mine is in the form of a download. I've had someone else tell me you can do it yourself and it's in the owners manual. I haven't looked yet. The reason this can be done is, because these bikes run to damn hot because of EPA! I don't know what HD
calls their early model year builds, but I picked mine up in the second half of April this year. This is their effort to try and cool these engines down, Before I try this, I've ordered a set of IED's to install first.