Even if you were to run the motors on a common spur gear, the minute differences in gear mesh, kv values and other minute differences when the esc is switching 2 motors at hundreds of times a second... If you want to run 2 motors, your going to need 2 speed controllers... The Only problem is that you now have 2 systems transforming your battery power to heat (esc and motor), limiting runtime compared to that of a single system.... Best bet is to get a high efficiency motor (neu, CC, Medusa) and be done
