Re: what did you do to your motor bike today?
Was riding mine just a while ago, and noticed just as the speedo nudges over 30mph that the display goes to "0". Maybe it thinks that there's no way that a bike will go over 30mph? Thought at first that I'd flung the sensor off the spoke, but it was still there. When you stop then accelerate again, it's back to working fine. Oh well ---- that's an issue that's not worth worrying about, I guess.
You're never lost until you run outa gas.