Updated V2 chatting to itself

[Dagger Thrasher]

Sounds like perhaps the deadband setting on your MMM is perhaps a little too small for your radio, and is causing the ESC to make very minor throttle outputs to your motor as a result. Try changing the deadband setting to a wider range...hopefully that'll cure it.

Either that, or it's just general interference that the stock AM radio is susceptible to. Do you have range issues? There's not a huge amount you can do about that if you do, without upgrading your radio to a 2.4Ghz system unfortunately. Even a decent FM system would be a big improvement.