Update:
I have been using my MMM 2650kv motor for the last month or so and just have not been able to get any consistant temps. No matter what gearing I tried the temps seemed higher than they should be. So I decided to change out the motor for a 1515 size. I had a spare TeknoNeu 1515/1.5D, so I decide to install this into my buggy. The TeknoNeu 1.5D I have is a square can, so I had to remove some of the material from the side of the can. I have found that the 1515/1.5 runs cooler and I can use more gearing options because of the added torque. The extra wires are for my Eagle Tree data logger sensors, they are just temporary and will be removed once I get the motor/ESC/Battery temps where I want them. Also I mounted a 40mm fan to the top of the motor to help with the cooling.