The reason I asked about the motor is becaused it wouldn't be using the scooters power source (directly), it would be creating power using the drive belt to spin the motor thus using it as a generator. The amount of resistance needed to spin the motor would be the only resistance (beside the slight bit of weight added). That's why this is not clicking. My question about how much power was more aimed toward how fast would that motor need to spin in order to create it's peak power? ( Spinning from the drive belt)

In referece to your recent example: If the electric bike will use the initial 250 watts to propel me at 20 mph I would need less than 250ohms of resistance ( to allow the motor to put out above 500 watts) to add more charge to the battery correct? And that is not possible...correct?