A 4000kV while still a bit high IMO, would probably work with the right gearing if its a 4 pole motor. I'm not convinced youll be able to gear a 5200kV short enough to keep it from overheating but I dont have that kit so all I can do is make educated guesses.
You can try it and see what happens but I have a feeling that with the kV being as high as it is youll probably end up needing the smallest pinion you can get with the biggest spur you can get. Honestly Id probably just buy a lower kV motor but play with the gearing and see if you can find a...
Well, I can't technically prove its not 120A but I'm pretty sure its a clone of THIS old discontinued HobbyWing ESC which is a 45A ESC. Now given that it says 120A I'm speculating that the Chinesium company that made it listed its peak power instead of its RMS (continuous) rating which is always...
So, theres a couple things to point out here.
Thats really a 60A ESC not 120A. That being said the stock ESC was also supposedly 60A also so that may not be a big deal.
The next thing I see is that youve almost doubled the kV rating from the stock motor. That is going to have a couple of side...