What would cause a digital speedometer to not register speed?

by Jim Hull
(Mattoon, IL)

I have a Roketa MC-102 150cc scooter with a digital speedometer in a gauge cluster. There is a battery gauge on the left side of the speedometer and a fuel gauge on the right side of the cluster.

The battery gauge and the fuel gauge both work fine. The speedometer will cycle through its start-up procedure when the key is turned on and then register 0 and flash the first section of a bar graph indicating speed.

However, once the bike starts moving, the speedometer still registers 0 and flashes the first section of the green bar graph.

What should I check? It does not seem to be an electrical problem because the gauge cluster works and is getting power. The dealer tried replacing the gauge cluster thinking it might be faulty, but the results were the same. His mechanic doesn't know much about scooters and is no help.


Comments for What would cause a digital speedometer to not register speed?

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Jul 05, 2010
Digital speedometer
by: George Jennings

I have noticed that a lot of times, it's a bad conection to the coil or a bad coil or ground.

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