Then what will the ecu safe to the adj. tables if there is no feedback from an O2? There is nothing to learn exept for how far to wind the idle stepper up and down. That is learned in the first start and always adjusted on.
Adaptive learning can happen only with O2's. Without them all you do is waist 15 minutes of fuel better used for some riding.
999 LC8 Rat-Rally custom - 500 EXC - XR666R '85