Hey if they'll warranty it for nothing then you might as well have them fix it.

I think it out of warranty

Are the wires shorted internally, or are they rubbing where they exit the motor can? If they are rubbing where they exit the can maybe you can fit a grommet in there to keep them from shorting anymore. Even a piece of balsa wood would work. It might be a temporary fix but it should make the motor usable until you can buy a replacement.

What's the cost of repair? Can I open up the motor n check?

I think the repair cost is 1/2 price of the motor. I might be mistaken though.
phil

the cost of the repair I believe is 80 dollars I am not sure if that was if its under warranty or without it

Definitely sounds like a short in the motor. Do not open the motor though. Send it directly to NeuMotors. Here is their repair information. repairs@neutronics.com

They can let you know an exact price, and all other pertinent information on getting it repaired.

Yup, shorted motor. I've had that happen. Mine (not Neus) were shorted internally. Stop running it or it may take your ESC with it.