2mph isn't bad, Peters. I suspect some are off by way more than that. Sounds like you got a pretty good one.
I would agree! to echo others, mine is off by 7mph, confirmed by friends Harley (yes, we ride together-talk about quite a site. Fat boy vs ppl 50) Any way, I just compensate for it, not a big deal for me to try to fix it. (yes, I can be lazy)