motor hang direction question

[BrianG]

I don't think it matters. I would mount the motor(s) on it and see which orientation gives you the weight distribution you want. Some people may want more weight in front to tame wheelies, while some may want more weight in the rear for better rear traction (and wheelies). The only issue is the motor direction, which can be fixed by swapping any two motor wires (if brushless).