motor for emaxx on 3s ??

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i just ran my emaxx on 24/66 with a 10l on 3s the speed was increased alot from my old setup 20/68, i only ran it for 12 minutes but i dont have a temp gun , i could put my finger on the motor for about 5 - 6 seconds then it gets too hot, does that mean that the motor is way too hot and i should gear it down or is it good ?