Hey dans, do you work for buell? Confirm that with someone that does please, because I'd really like to know from an official employee of Buell what the models were designed to top out at. Oh and the speedo's are off at a consistent mph (3-4) or whatever across the entire range. It doesn't get worse the faster you go because the speedometer cable or sensor (depending on what kind of vehicle you are running) was designed to match whatever the speedo registers, or sometimes a little more. For example an army HMMWV registers 60mph but will do at least 80mph before the speedometer cable snaps. It is off consistently 2-3 mph across the entire range of the speedometer. Granted there will be exceptions as with all equipment. But it will be rare indeed to find a speedometer that gets progressively worse the faster you go.
Please don't get offended because I'm not trying to ba an ass or whatever but I am aware that I come off that way to alot of people most of the time.