Your Curry setup, is it a hub motor?
I ride a Huffy step through. Okay, it's a girlie bike, but I get stiff at my age and can't get that leg over sometimes.
Anyway, it's got 7 speeds and a 24 volt Curry 450 Watt geared motor on the rear wheel. I have to ride up a couple of pretty good hills on my r/t to work and back and this helps get my 200+ lb. weight up those hills without killing me. Only drawback with these things is if you can pedal faster than 20 mph, the motor won't kick in. Something I can live with, though. I'm not in any hurry.