To address an earlier post, the AI summary is wrong about the bike seeing the FOB as you approach, at least for this model. When off, the motorcycle only scans for the fob or key after the ignition switch is toggled, after which it scans for approximately 5 seconds before either timing out or recognizing the FOB or key and turning on fully. Scanning all of the time is a waste of battery and serves no purpose.
The other AI summary is correct that this motorcycle (or virtually any keyless motorcycle) will not automatically shut off while riding simply because it doesn't see the FOB. That's for safety reasons.
If you have at least one key, it's relatively inexpensive to associate additional keys with the system. But if you've lost all three, it's a more expensive problem and requires purchase of the keyless ECM kit (which includes a new ECM).