6 pole motor and 9920

[What's_nitro?]

I believe the BK controllers have a Max RPM of 40k with 2-pole motors. You can certainly run motors with more poles, but there are things you need to know. A 4-pole motor will require twice the number of pulses from the ESC to operate properly at the same RPM as a 2-pole motor. So with a 2-pole limit of 40k RPM, that would be a 20k limit with a 4-pole motor. You could use a 6-pole motor as well, but the MAX allowable RPM would be way too low for use in a car/truck because you would have to gear really high to get any speed out of it. Now if you had a rock crawler, that would be fine.