Strange days indeed...
I encountered a rather odd activity from my speedo earlier today. After starting the bike, I began riding away. I looked down after turning onto the street from the parking lot, and realized the speedo needle was pinned at the top end of its travel (I was actually going about 50). As I slowed, the needle dropped, but remained well above a normal and accurate reading. The LED max speed indicator, by the way, continued to read normally so I discounted a sensor problem.
When opportunity allowed, I turned off the engine, waited briefly, then restarted. The sweep occurred normally, but the needle would not return fully to zero. Tried this several times, the needle moved down a bit more but still read about 15 mph when on but not running. After I reached home, I left the bike turned off for about an hour, then repeated this effort to reset the unit. After two or three more on-off cycles, the needle finally returned to zero after a sweep.
It's possible the stepper motor had a brief nervous breakdown, or a spike or momentary ground loss caused the unit to temporarily lose its mind. Not too sure how to troubleshoot this one, or whether to get a stepper on order...
