Wake-Up Dormant Electric Motorcycle Battery
I found the specs and it says a patent pending Lithium Hybrid Array,


  Using an advanced monitoring system, each cell in the power pack is individually controlled during charge and discharge. The onboard charger integrates into this system and uses a specially developed charge profile to optimize the power pack’s recharge time. Using isolated power systems the Zero DS uses a standard 12 volt current to run the dash, lighting and other on board accessories. 


Usually excessive UnderVoltage state must be very time limited and long term is fatal to performance.  But saying that, you would get best advice from the OEM. 

But it appears to have all the design features to just plug in and hope for the best.