Imo you have been told those batteries arnt suitable to a 1400 motor, i think tekin recommends a 5-6s for it. I am running a 2050 in mine, would of prefered the 1900 but with a shipping mistake i ended up with a 2050.
Basically the car was designed for 4s, a 1400 running on 4s will be slow as hell. if you can fit 2x 3s packs into it to get the 1400 to work properly id imagine it would be rediculously overpowered. i saw a 6s ebuggy on youtube an he couldnt give any throttle as it wheelied or backflipped. also i dont think you are allowed to run a 6s at any big races, might get away with it at club lvl.
Im going to be running 2x sets of the batteries you linked in mine to get 4s but with a 2050 motor. if you going to get one get a 1900 an im sure you will be more than happy
