Wheres the motor? he has a drum brake on the front.. and seems to have internal hub gears on the back..
The motor is the front hub see this page
http://www.evehicles.com.au/EVOConversionKit.shtmlIf you look at image closely there is a wire coming from the hub and goes to the bag on the rear rack.
Also the bike has front brake callipers fitted if it was a hub brake then there would be no need for them.