The Bionx battery on my set-up has been dying out. Only reaches about half full when charged, and it is past the warranty. New battery is several hundred dollars ($850 from the store I originally got the Bionx from), so I've been putting it off and looking at other options. Plus, I tore up the recumbent seat, so that has to be replaced.
The other day, I found a relatively new (2009) Ezip on CL and paid $225 for it. Just set it up the way I like with gel seat, carrying basket, lights, tires lined and slimed, etc. for another $160. So total cost of $385 for a whole new bike and motor.
I think I'm going to end up liking this more than the big expensive electric recumbent I've got. Riding has been relatively comfortable. It seems to go stronger and further with throttle alone. Also a higher wattage than the Bionx, so my pedaling is better supported. It's been charging more quickly than the Bionx ever did. And the replacement battery is way cheaper.
I'm thinking I should have gone this route in the first place. Now I have to figure out what I'm going to do with the electric bent...and maybe come up with a new user name for these forums.