The controller for the DIY motor was not capable of doing regenerative braking, so he fitted the capacitors to another e-bike that does have regenerative braking. Using this feature, he was able ...

To test out his handiwork, [DIY King] took to the streets and was able to get the bike up to 70 km/h (43 MPH) before his courage ran out. He thinks the motor should be able to push it up to 85 km ...

Considering you can unlock the firmware on this motor to crank output to 2000w, this system is definitely a force multiplier that turns any bike into a motor vehicle. The total cost would be close ...