I picked up a recording DC amp meter last year. Here are some readings I took at about 4 samples a second.
Keep in mint the locked rotor amps will be very fast and hard to catch. This part of the curve shows that it is back to running amps in about 2 seconds.
I might guess that the armatures have .07 ohms combined in parallel. Ignoring the voltage drop in the battery amps = 36V+/.07 ohm= 514+ amps.
I am interested in trying new battery but have been worried about this very issue if the BMS would be a problem. What is the size of the battery and rating of the BMS?
Rob