When an e-bike suddenly stops working, cuts out under load, or powers on but will not move, it is easy to assume the worst.

You begin pedaling, but instead of the motor responding immediately, nothing happens for a moment. Then the pedal assist ...

DIY e-bikes are often easy to spot. If they’re not built out of something insane like an old washing machine motor, the more subtle kits that are generally used still stand out when compared to a ...