I used to think that, in relation to their propulsive power and efficiency, the Zike and the like were massive but look at this:
Electric Bike Kit on eBay, also, Bikes, Cycling, Sporting Goods (end time 17-Nov-08 17:56:36 GMT)
Electric Bike Kit on eBay, also, Bikes, Cycling, Sporting Goods (end time 17-Nov-08 17:56:36 GMT)