There are many versions of your $3-$400 scooter, mine has 36 volts and a 240 watt motor. Most electric bikes have a 400 to 600 watt motor so a bike really outperforms these scooter variations.
IF you have the 500 watt motor I'd like to know where I could buy one.

Also is you tire size 16 x 2.125 or is it 18?