I moved the 9920 to my sons Emaxx running 3S Lipo and a Mamba Max 5700 motor. It's cutting out like crazy at full throttle. It never did this running my LST2 on 5S.
What the heck?
Mine:
2007 Grizzly 700 EPS EFI
Sons:
BL E-Maxx
4S MA 4000 Lipo/MM ESC
Feigao 9XL 22/54 gearing
Gmaxx single speed
Probably you're having the same problem as me with the 149.18 controller with 3s. The MambaMax motor in a Maxx?!!!! Tooooo small!
You should atleast get a Wanderer L size motor with 4s lipos if you want to eliminate the abnormal stuttering.
Also, if you're not using an external BEC, because I have a feeling that your controller's BEC is not working right, it might be the reason why its stuttering like that.
The name is Alawi. You can call me Al.
Nice to meet you!