That is up to you. Given the case length at 54mm it may be too short to make the torque and handle the load of the emaxx. What speeds were you looking to get?
around 35 mph with something smooth and light and hopefully not have to worry about cogging. i mainly just putt around and hope that this would be stronger than a mm7700 which is what i am using now. i just hope that it would have some nice grunt but not insane speeds.