Hmmm. Thank you very much for the prompt suggestion, Bob. That's not my reading of how that button (and the ABS light) work, from the manual. FWIW I did try to disable the ABS using the button on the (left side) cowling, but that did not work either to disable the ABS (which would have been indicated by a slow flashing of the ABS light) or to turn the ABS light off. Is that manual badly written? It says: "To deactivate the ABS system, Turn the ignition switch to the "ON" position, Press and hold down the button. After roughly three seconds the ABS light on the panel will begin to flash. Immediately release the button. At this point the ABS light on the panel will continue to flash slowly; the ABS system is completely deactivated. To reactivate the ABS system, stop the vehicle and turn off the engine, turning the ignition switch to "OFF". Turn the ignition switch back to "ON" and start the engine. Once the vehicle begins to move the ABS system will reactivate once the vehicle has exceeded 5 km/h (3.1 mph". Are you saying Bob that in your experience there's a simple toggling on/off function to the ABS, controlled by the switch on the cowling, which isn't described in the manual?
Anyway I just took the bike out to be perfectly sure I was getting it up to speed to activate the ABS and so cancel the light, and I noted that the speedometer was indicating exactly zero. On initial ignition-on the speedo needle does the full-sweep thing, but doesn't indicate road-speed. Furthermore after a few kilometers the red triangle light came on. So I stopped, shut down, and re-started. No change (ABS light on steady, speedo not working, red triangle light on). Tach is working and the bike seems to run fine.
Now what's going on with this speedo? I looked but don't see an obvious pickup anywhere, must be off the transmission. I'm going to disconnect the battery for a few hours, in case this might reset things and make this miserable situation go away.
Any further suggestions would be much appreciated.