Found some more motor graphs online for the Cyclone mid-drives showing their "sweet spots" for maximum power (look at the curve labeled "Wo" for Watts Out) and for maximum efficiency (labeled "EEF"):











Link to original page: http://www.cyclone-tw.com/dc24.htm



It gets rather apparent that not all motors are created equal even when they are just different wattage models from the same company. Their 500 watt motor graph looks the nicest to me for having the two sweet spots fairly close together for setting them up so the gearing between the pedals on a mid-drive bike is such that the motor can hit both of the sweet spots within the normal comfortable human pedal cadence range with the power sweet spot at lower pedal cadence and the efficiency sweet spot at higher pedal cadence so "pedaling into" the motor while it is propelling the bike pushes you into a higher efficiency zone as you take more of the load off the motor.

I own their 360 watt motor and have it installed on my long tail cargo bike but it doesn't have the original controller but rather a programmable Kelly controller on it and I imagine that changes the resulting graphs quite a bit, in fact for the lower RPM range I know it does for sure because I've got both battery and motor side current limits set in the programming where as the original cyclone controller only limited current on the battery side of the controller so I know that changes the whole bottom end performance. Not sure how much it changes the upper end by changing the controller, must have some effect though.