I just purchased a used 5.5 HV motor. I installed it in my hyper 10sc and really seems to be lacking power, both torque and rpm. I am currently using a XERUN 120amp sensored ESC and 2s 25c 5000mah lipos. This ESC has powered other sensorod motors and non sensored motors with zero issues. Also tried with a Traxxas VXL Esc and same issue. I have double checked all the ESC settings and tried the defaults. No noticable difference. None of the wires get hot nor does the motor can . The motor does not cog and seems smooth but just seems to be lacking power.

I took of the front housing to look inside, no signs of burned windings or overheating. One thing I did notice was the rotor magnet seems very weak. In other motors I have took apart, the power of the magnets were extremely powerful. This one seems like a refrigerator magnet.

Any thoughts or advise?

Thanks!