http://www.rctech.net/forum/radio-el...-ii-mmpro.html

I have the same problem. Motor works fine on other esc's than the mmpro. My sensor port is fine and it worked with my LRP 21.5 sensored with no issues. I ended up just swapping to a different ESC.

**Edit** this solution seems to have just masked the problem. The hobbywing I tried to replace it with jus. Had so much lag off the line it hid the issue. I could probably play with punch or torque control and make it work the same with the mamba. The performance is just so weak I think I have motor problems (brand new motor too)

My suggestion would be to try another motor on the mamba or try your motor on another esc and isolate the issue.