Step 12: Motors

Picture of Motors
Motors are electric scooter motors from toy scooters. You can get them from electric scooter suppliers or ebay. These are 250Watt 24V each and come with an 11 tooth sprocket already fitted which has teeth spacing that matches those on the wheel sprockets - conveniently.

You could try 300 watt ones (that look almost the same). Just make sure they are the same as each other.