speedo / odometer calibration

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Old Sep 22, 2008 | 12:58 AM
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NVliterbike's Avatar
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Default speedo / odometer calibration

Hey guys, I have an 04 1000rr, -1 in front, +2 in the rear. I know any gearing change affects the speedometer and odometer. I was planning on getting a speedo healer, but I noticed that the odometer is racking up more miles, while the speedometer says I'm going slower. This was verified running next to a stock bike and also a couple of cars. How the hell is one faster and the other slower? I would have thought they would both be off in the same direction...
 
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Old Sep 22, 2008 | 03:33 PM
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From: Spring , Tx
Default RE: speedo / odometer calibration

5. Will the SH calibrate both my speedo and odometer?
Yes, but it is not possible to calibrate them separately, as one speed signal drives both the speedometer and the odometer.
You can get 100% accurate speedometer AND 100% accurate odometer only on those bikes, which have zero "speedo-to-odo" error ratio (see FAQ #16) built-in, such as the Yamaha FJR1300.
On most bikes, if the speedo is calibrated to be 100% accurate, the odo will register slightly less miles. While this can be annoying in certain situations, one can always calculate the real distance easily after a long trip.
Alternatively, of course, you can get the factory default indication regardless of the used sprocket ratio: accurate odometer and slightly optimistic speedo.
With our on-line calculator, you can optimize the calibration value easily for either speedo or odo.

16. What is the "Speedo-to-Odo error ratio"?
There is one speed signal which drives both the speedometer and the odometer.
However, the manufacturers make the display units such a way that the speedometers usually read high, while the odometers are quite accurate on stock vehicles.
Speedo to odo error ratio is the quotient of the indicated speed, and the speed which drives the odometer internally.
This error ratio is fixed in the dashboard logic, i.e. it's bike model specific and will be constant no matter what you change on your bike.
The speedo to odo error ratio is almost the same as the initial (factory) speedo error, considering that the odometers are usually accurate on stock vehicles.
http://www.speedohealer.com/eng/faq.htm
 
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Old Sep 23, 2008 | 01:21 AM
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Default RE: speedo / odometer calibration

Ya I read that too, but the thing is the miles and MPH can't be off in different directions. Since my odometer reads more than actual miles, how can the speedo read less than actual speed? Wouldn't the speedo be faster if the odometer was high?
 
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