I have a Cup bike, race track only. They don’t have a working speedometer/ odometer because there are no ABS rings on the wheels, no associated sensors or wiring connected the the ECU. As a consequence the ABS light on the dash is always lit. This is normal, as there is no ABS. I’d sort of like to have an odometer, just to keep track of mileage. It would be easy enough to connect a bicycle speedometer/ odometer, but if I can easily make the existing one work, it’s one less complication. A plus being that the speedometer on the dash will work, not that I’m going to spend much time looking at it.
My understanding the the street bike’s speedometer is driven by the front wheel’s ABS ring. The next time my wheels are off, if I were to install an ABS ring on the rear, and connect the sensor to the connection where the front sensor is ordinarily connected, would this give me a reasonably accurate odometer?
I know the rings front and rear are different sizes. I assume this is to account for the different tire diameter. So my assumption would be that having the speedo driven off the rear wheel would give the exact same reading if it were driven off the front. The different sized rings give the ECU a 1:1 reading, the software isn’t factoring in that the rear wheel’s rotation is 104% (a guess) of the front.
True?
As it is I am running a (standard) 140 rear instead of a 150, so there’s going to be some error anyway. But I’m not interested in absolute accuracy, as most factory speedos read a few percent high anyway. As long as it’s accurate within a few percent, no problem.
Will this work?
My understanding the the street bike’s speedometer is driven by the front wheel’s ABS ring. The next time my wheels are off, if I were to install an ABS ring on the rear, and connect the sensor to the connection where the front sensor is ordinarily connected, would this give me a reasonably accurate odometer?
I know the rings front and rear are different sizes. I assume this is to account for the different tire diameter. So my assumption would be that having the speedo driven off the rear wheel would give the exact same reading if it were driven off the front. The different sized rings give the ECU a 1:1 reading, the software isn’t factoring in that the rear wheel’s rotation is 104% (a guess) of the front.
True?
As it is I am running a (standard) 140 rear instead of a 150, so there’s going to be some error anyway. But I’m not interested in absolute accuracy, as most factory speedos read a few percent high anyway. As long as it’s accurate within a few percent, no problem.
Will this work?