To clear up the pedal thing:
its best function is used to pull the motor back and allow it to rev up then by letting tension off the pedal thing engage the motor to the belt like a clutch.
Poor mans clutch pully.
if u force it the otherway ie more tension on the belt it usually just results in too much belt tension and friction and the slowing down of ur bike.
I've tested the theory of forcing the motor forward and back manually on my moby and this was the result. I never actually tried that product.