speedometer ratio

Discussion in 'Other Service and Maintenance' started by otis71, Oct 1, 2012.

  1. otis71

    otis71 New Member

    I have an old HD police special speedometer made bt stewart warner.There is no HD part # but on the face it says stewart warner 432475On the back what I believe to say 64OHF2 is printed in ink.Can anyone identify this as a 1:1 or a 2:1 ratio speedometer?
  2. tourbox

    tourbox Senior Member

    Is this is on your 1964 Fl as in your name & bike. If it is then with a speed-o drive off the tranny it is a 1:1, if off the front wheel then it is a 2:1. You can get a 2:1 speed-o by changing the drive unit in the tranny to a different gear #. I think they were 23 tooth for 1:1, and 11 tooth for 2:1. If my memory is still active.