Update! This design proved to be impractical due issues with the drive train. The alternator motor has little torque so needs some kind of gearbox. For this reason I shelved this project and moved on to a hub motor and I DO NOT recommend you follow this build unless you have access to a suitable gearbox. This is the first test of the ebike V2. It went very well with only minor issues so very pleased. Apologies for the shaky camera work. I don't have a GoPro so just make do with my Panasonic Camcorder. Top speed was around 33mph Current draw was 41 amps at 50V so 2000W ... https://www.youtube.com/watch?v=u0rSeDon__I

Not how LR would like you to do it but....... ... https://www.youtube.com/watch?v=MSZd4WZuGqE

Absolutely positively the last video with the old alternator motor. Probably! I've refitted original motor as it runs a bit cooler and finally got it to work in Delta mode. I've also added a tensioner to prevent the belt slipping but this just increases the friction so that it is even harder to pedal. Which means it also runs the batteries down quicker. If the motor was about half the weight and size I could fit a toothed pulley but I don't think it is worth my while taking this any further. Now that I've been stupid enough to break 2 spokes in a testing accident (I tell you how in the video) the wheel needs to be taken apart and repaired. This means it is not worth while rebuilding in it's current form. ... https://www.youtube.com/watch?v=o9WH8GTqWn0

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