TEKIN T8 motor problem.
 

Well to start off i have a 1900kv tekin t8 buggy motor and just earlier today i was cleaning up and prepping my buggy for a day at the track tomorrow. Take it out and do some test runs to check everything and then about 10mins later the buggy starts making a ugly chatter, buzzing and wining noise. It would go away about half throttle then come back for a couple seconds before hitting top speed on full throttle. I stopped everything checked the screws to the motor mount, pinion and everything i could think of. Nothing worked, noise was still there. The motor is only 3weeks old and maybe a total of 7hours on it (from track usage not bashing). I decided to do maintenance on the motor to check bearings and make sure everything is fine internally. Bearings are fine and motor was clean inside but i found this. I attached two pictures check them out. I cant explain or see how a dent ended up on the center shaft cup. No damage in the motor or any debris from anything. Any ideads? Im calling tekin up, im guessing its a pre-existing defect or something cause theres absolutely no trace of damage in the motor. Please give me your input, Thanks

Is your RX8 running on the newest software?

Running it on my monster mamba esc. Yes i know shame on me but i was trying this motor out compared to my mamba one and didnt wanna dish out over $300 just to see if i like it lol.

Ok I was going to say it could be a bad sensor board on the motor. But your running sensorless

Yea and that dent is an impact mark not a rotating gash. What do you think about it?

Looks odd. Tekin is really really good about their stuff. Send them and email with the pics, and follow up with a call about 20min later

Ok cool yea ima definitely do that. Thanks

+1 tekin will take care of you. T8 problems are rare, I've owned 6 of them since 3 years and they've all been great so far (racing use only)