Another possible option is to duty-cycle the alarm/tracking unit and have a discreet electronic switch.
My proposed key replacement unit may comprise an RFID token reader with an integrated small rechargeable battery, and an external small water-proof momentary contact switch that is accessible to the owner (mine may be attached to the black steering well tank fairing pieces). Push and hold for integrated battery power and the reader, mounted against the inside of the tank top, becomes active. The owner is authenticated via their card, and a relay/electronic switch enables bike power via the switch wiring (switch now removed). This bike power is now available to charge the integrated battery and a latching relay prevents reader or power failure-induced state changes. A cool decal would advertise the alarm and power switch are now “in the personal cloudâ€, or similar.
I would require the RFID card be held in proximity for a few seconds to enable bike power systems AND to disable the bike power systems. Of course, this alarm will not function if the bike is lifted into a vehicle, but it may discourage potential theft.
The advantage of this system is that it adds an authenticated electronic switch to the bike without tapping directly into the warrantied power system, and only replacing the original switch wires with the unit control unpowered wires. The entire system is powered by the integrated on-demand small power cell, or via the standard fused Zero accessory socket. Of course, I would carry the appropriate hex key to remove the tank and bypass the system in the event the reader fails in one of the 2 modes.
I’ll research low-power low duty-cycle satellite beacons. I have one on my boat and a Greek ship-tracking facility keeps me advised of where she is located any given minute. This can cycle on every few minutes for a few seconds, or remain on if the bike is powered. Theft is not the concern for the boat, but geo-positioning, tracking, and localized speed of a sailing day is of interest (photo). I can also transmit various ship’s systems data via simple programmable ports on the unit. My iPhone is always in touch with her, and a redundant cellular telemetry system allows me to manually interrogate systems upon demand.
An alternate and cheap method may be to just install a hall-effect sensor behind the tank. You place your new key-magnet to the known area and a solid state switch, or relay, latches the system power "on" (initial power supplied by integrated battery). Pressing again could latch it "off". This may be sufficient for general bike thieves that smash the main switch to power the bike, and would also probably preserve the warranty.
I believe the costs of the RFID authentication switch would be around $100-300, the hall effect/magnetic switch around $50.