Mamba Max Pro Cogging?

[kazuaki]

I can't say I have ever experienced "cogging" before, but I understand it is a roughness at part throttle, correct? Please check out this video and tell me if that is what is happening here. This is my brand new MMPro, so I'm pretty bummed about it. I've tried two different radio systems and two different motors. FWIW, I'm just trying to get my terms straight and see if there is anything I could be doing wrong. Or is this simply my bad luck and a defective ESC? This happens at very light throttle to mid throttle. If I get hard on the trottle, I can get past it. I tried running it in the street a bit and it's nearly impossible.


[youtube]wDWZUbWuWYM[/youtube]