Attached is a pdf file on how to convert your 120MPH speedometer into a 140MPH or other speedometer. This article is NOT designed to correct MPH discrepancies due to changing tire sizes or rear end gears.

MN12 Speedometer Conversions



Special thanks to Larry Sheridan for submitting the article and to Ben Wenger for converting the original article into a pdf file.

Here are some other links here on the SCCoA and on the TCCoA for additional reference:

SCCoA Thread

TCCoA Thread

This one can be a little tricky guys/gals so read the information thoroughly and proceed at you own risk. The SCCoA assumes no liability for your results.