I don't know what you want a pic of. Here is a 11T pinion on a 46T spur with a LOSI 8ight.
http://www.rctech.net/forum/showthre...=158327&page=4
With a larger pinion on the mechanical side, it is harder to overcome the interia of the rotor from a standstill and to overcome the static load of the vehicle.
If you ever drove a manual automobile you coud get the idea of starting your vehicle out in a high gear and seeing that the vehicle will stall or you have to feather the clutch a lot.
On the 3 phase induction motors that these Neu Motor are designed around, it is essentially one magnetic field in the rotor chasing another field in the stator. If they cannot move relative enough of each other, it is like a short(they heat up, the same thing happens too when there is too much "slip" between the fields) and so does the esc for trying to put more load to the motor. That is why the sensored motors work better because it knows the relative position of the rotor while putting the inital power to the motor.