He (xero) meant that he just unwrapped some of the winding around the motor's armature. I dont see how that is possible because it wouldnt spin true anymore..I race electric offroad (1/10th scale) and the mod motors are classified in 'turns' or how many times the wire is wrapped around the armature. The lower the turn, the lower amount of wires wrapped around the armature, causing faster speeds. The byproduct is heat and less run time. (drawing more current) If Xero really did this (in no way am I saying he didnt..) the motor would be drawing more current from the PCB, and it may possibly burn it out..