I have one of the ZAP electric bike kits that is now about 13 years old, I've put thousands of miles on it, at the time it was one of the only kits avalible, and for being a friction roler driving the rear wheel running off a lead acid battery, with a motor controler that switches the two motors between searise and paralel to change between high and low speed (works ok, but I added a 3rd speed with a switch that turned on just one motor, more range at a higher speed, less tourqe tho), I however wouldn't buy another Zap kit, unless they compleatly changed their design, and I hope they did, it was very crude.
if I was to get another kit, and I've been thinking about it to have a dingy (small vehicle to carry with you), I would most likely either go with the Golden Motor hub motor, or the Currie Tec set up that is a sun gear and change drive that bolts around the spokes of your hub to give a direct drive on a wide range of wheels, I like the Golded Motor set up because it's cheap, and it's a direct drive motor built in to a front wheel hub, and it spins so smooth and free while coasting.
In wisconsin you can have an electric bicycle as long as you can remove the power device and still use the bicycle under human power (it has to be an add on) you can't go over 30mph, and you have to have at the very least a learners permit, but no license plates, no regestration (other then bicycle regestration, and who does that?) but my ideal is to put the power source on a trailer with a switch on the hitch, so when you go up hills it pushes you.
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