My Losi 8ight T

it is just as bad to run too low of gearing, this will result in a hot motor and a cool ESC. 12 tooth maybe too low. I prefer to run a lower kv motor and if you need more speed to gear up. I run a 1100kv motor in my 10s Revo it it runs very cool even with a 40/20 spur/pinion ratio