Check out Onemotor.co. I received mine 2 days ago, still figuring out all the functionality so not quite ready yet to review, but....so far it's amazing. Fast. Removes in seconds, fits inside my mini backpack, installs in seconds. I'll review after I've had it a week or so....here's a pic on my Dahon, though. Mounts in several different options...LIGHT...4.5 lbs total or 6.5 for the bigger battery. Wireless throttle, wireless PAS.
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This is not a pakit, it's a dahon mu uno with a pakit sticker on it.