youngoldbloke
The older I get, the faster I used to be ...
There is. The motor cuts out at 15mph. That's a speed limit. If you're talking about e-motorbikes or e-mopeds, that's different entirely. As I said, some people can certainly pedal faster than that, but it's no longer assisted by the motor. So there is a speed limit.
Do you ride an e-bike? I have two LEGAL e-bikes where the assistance from the motor cuts out at 25kph/ 15.5mph. It does not limit my speed. I can then pedal the bikes to as high a speed as my unassisted legs allow. There is no overall speed limit on legally assisted bikes. The motor cut-out is not a limit to the final bike speed.