I just installed a viper vtx 10 black edition esc and viper vst 17.5 motor in my new b4.1wc. Everything has been calibrated and I used the 17.5 spec w/ boost profile. I took the buggy outside and drove for a little less than a minute when the motor started losing power and cutting out. I tried recalibrating the esc and double checked the sensor wire which seems to be ok but none of that helped. Solder joints looked ok so I have no clue what's going on.

Nevermind, I figured it out.

dead battery