Unlike cars these bike alternators don't turn on and off. Instead the regulator reads the system voltage and either sends power to the battery or burns it off as heat, the alternator is always producing power. I wouldn't be surprised if the R/R (Regulator / Rectifier)(probably mounted under your battery box) decides to burn off all power the alternator is making when it sees the voltage spike that would be produced when you unhooked the battery.
No power from the alternator for the the plugs at that point and the battery would also be out of the power loop.
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