This is the big brother of the Multicopter Builders 2206 2400kv motor that was already on the bench. This is the mid KV version, with a higher KV option on the bench soon.
This is an interesting motor, as it is a slight stator upgrade to Multicopter Builder's Returner R3 based 2206 motor that was test earlier. In addtion to an extra mm of stator height, it also has upgraded bearings, using EZO bearings rather than the NSK bearings in the previous generation. Other than that the build quality and tolerances are the same as the previous motor. The Returner line has been one of the most popular mini-quad motors on the market for quite a while, and the fact that this design is capable of producing a 2207 motor at only 31g demonstrates why that has been the case. In fact, with short wires, the motor gets awfully close to 30g. This motor has one of the most impressive power to weight ratios on the market. Whether that impacts long-term durability will require in-flight abuse and a larger market share reporting their results.
The numbers here are very solid. In terms of torque production this motor falls right in between the ZMX Fusion 2300kv motor and the T-Motor F60 2450kv. What's interesting here is that all three of these motors draw roughtly the same current, making the MB motor right in the middle in terms of efficiency as well. It is also worth noting that because of the large stator size on this motor, it will handle higher voltages very well, producing even more torque with the voltage boost. Overall this is definitely one of the top performing motors in it's weight class, providing excellent torque and power output while keeping current draw in a reasonable range.