I'm sure there will come a day when the EZM will be available without the engine....it may be a while, though.
They're cutting out a huge market by only offering it with an engine. Last I checked there were a ton of people here who already had Hondas or HS engines on their bikes and were looking for something better than the unreliable Hoot or noisy Grubee transmissions. I'd certainly pick one up myself.
Ah well...