Picked up a 1/10 Mamba for my Losi xxx today, installed a 10.5 sensored motor. Followed programming instructions and cant get the motor to run. If it's a programming issue, can it be done through the transmitter?

If this is the Mamba Max original you can't run sensored motors with it. It's a sensorless speed control. If it's the mamba max pro make sure you did the radio calibration correctly.

It is the one with the sensor wire input, and I tried the calibration 3x.

i also had this problem,its fine after i update the esc software

try connecting a brush motor and run it,if it works,updating the esc should solve the problem

You have to wire the motor to the MMpro A/A, B/B, C/C.
Set your EPA's (forward & reverse) at full.
If your using a Futaba TX reverse the forward channel.
Do the calibration.
If your motor run backward change it in the ESC's software and re-calibrate.