http://www.youtube.com/watch?v=Q8pyd...layer_embedded
His setup is 25t pinion/43t spur 39t idler (locked in second) and the stock flux torq 2200kv motor. He ran very hot just after a few runs but he was only going for high speed...
he has no burned that MMM because he was trying to run the same setup on sand = BOOM.
But he was just trying to push it as hard as he could. He is now geared more conservatively and is just bashing.
But it shows it is possible!