How does one calibrate a speedometer?

The GPS and my bike do not agree.  120KPH on the bike speedo is 107 according to the Garmin , which happens to agree exactly with the speedo in my Toyota.  The good news is that as long as I keep an eye on the needle, I should not be getting a speeding ticket. It could be a disaster if the error was the other way round.

On the other hand, according to my bike odometer, I rode 401 km from Bindoon to home, whereas Google says the distance is 362 km.    That is quite a variation and I suspect it means I am adding mileage and depreciation to my bike at an excessive rate.  What can be done about that?


About Alan

Alone in a sea of spinifex.
This entry was posted in Handy Hints, Hobbies, Life, don't talk to me about life!, Lifestyle, Motorbikes, Motorcycling, Nightmares, quandaries and Dilemmas, Riding, Science, Travel and tagged , , , , , , , . Bookmark the permalink.

5 Responses to Calibration.

  1. Pingback: Yellow Box | Hodophilia

  2. Observations of a Perpetual Motorcyclist says:

    A little bird told me that as part of the ADR requirements all speedos need to over-estimate the speed, but it could be an urban myth. How to fix it? No idea.


  3. DaveB says:

    Bigger front wheel?


  4. Chris says:

    I have had the same problem, I have installed a Yellow Box . It goes in line with the speedo connections and is infinitely adjustable.


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