ezrun is sensorless. the higher kv of motor and the harder the gearing the more likely you are to get cogging. i would expect gearing to be very low for something like a 6800 so is it overgeared?? i run ezrun 35a with 13 turn motor (3000kv) at club and it cogs mildly on low throttle now i am on 27T pinion in my fk05 on a 25 tooth pinion there is no cogging at all.
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