This 40A brushless motor kinda surprise me that they really works. Well, for now at least. I don't know if they works with 2 belt in different directions. Gotta go get 9 teeth sprocket for another motor.
The reason why I use brushless motor is because the controller is way cheaper than those high power brushed motor speed controller(50A+). Could anyone tell me why they are so fxxking expensive? like $400~$800 USD??