Speedometer gone wild

Discussion in 'Touring Models' started by ultraj, Dec 20, 2010.

  1. ultraj

    ultraj Member

    Hello all and Merry Christmas,
    I need a little help, I have a 2001 Ultra Classic and the speedo decided to go a little crazy yesterday. Was working just fine until after a startup I noticed the speedo went to 70 and I was doing about 30, I looked in the book and just wondering if the speed sencor is the problem. Any help would be appreciated.
  2. trickydoc

    trickydoc Active Member

    Its easy to pull the sensor and clean it. sometime they get a little metal buildup on them and stop working correctly. If cleaning doesn't work, you mig have a bad electrical ground
  3. R.Bingham

    R.Bingham Active Member

    The speed sensor is usually the culprit but a faulty voltage regulator cause this too. If the regulator is letting too many volts through it overloads the electrical system. It should not be getting more than 14.6 volts at any time.
  4. alto

    alto Active Member

    I also have an 01 Ultra. When my speedometer started to mess up, so did the signal light self/cancel feature. I was told it was, most likely, the speed sensor. Also, that taking the sensor out and cleaning it would probably be a very temporary fix.. After 20 or so miles, the speedometer started to mess up again. Replacing the sensor did the trick for me.
  5. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

    Dont know how new you are to this bike but, on my 03RK if you turn on the ignition switch and then the kill switch and you dont wait for the lights on the speedo to go out before you start it. The speedo will be off considerably as you mention. It seems the speedo calibrates to the speed sensor kinda like booting your computer. If you start it before this is complete it don't do good.

    Ask me how I know!:tounge

  6. Jack Klarich

    Jack Klarich Guest

    A bad battery can cause this too:s
  7. btsom

    btsom Active Member

    Seems to be lots of possibilities. If that is the electric speedo, in reality it is a tach which is marked in MPH instead of RPM. As such, it counts pulses and a weak connection can cause an increase in the number of pulses with vibration. Had anything apart lately that might either provide a feed to, or a ground for the speedo? Recheck the connections.
  8. franka

    franka Active Member

    sensor on mine eventually i went digital
  9. ultraj

    ultraj Member

    Thanks for all the input, I pulled the speed sensor and there was some fine shavings on it, cleaned it real well and it seems to have taken care of the problem. I don't know how long it will last but for know its good.
    I haven't had the bike long (1 year) but have put quite a few miles on it. It now has 98,000 and still going strong just small things starting to show their age.
    Thanks again for all your help
  10. r_k_dragon

    r_k_dragon Active Member

    I hope your cleaning takes care of the problem. But I'll have to give Jack's, Bad Battery, a second vote having had the same problem.

    Steve E.