I had to replace my shot speedo and got one of the spun aluminum ones from HD. Problem is I went on a trip and I think my speedo is way off because I was barley keeping up w/semi's that I know where goverened to 57mph and I showed going just shy of 70mph. Is there a way to re-calibrate the speedo for the stock HD ones. I know aftermarket ones have a process but I could not find one for stock ones and my local stealership had no idea what I was talking about.

 

You might check this out:
http://www.ridegear.com/rg/F-50634.html?mv_pc=GOO100

 

Here's another option.
http://cgi.ebay.com/ebaymotors/SPEED...mZ140113970570

It says it's for a 6-speed, but it will work with any O.E.M. Harley electronic speedometer. S&S sells the same one with their logo on it.