Currently suggest just to leave the O2 sensor plugged in if present. We have not found much affect either way for the tune-up. There is not an O2 bypass kit developed for the bike.
Make sure you START YOUR BIKE to check functionality of the controller. DO NOT JUST TURN THE KEY ON. You will see the Red and Green flashing lights with just the key on. This is normal since power is being supplied to the injector, but no signal is being generated.
If you are experiencing any decel popping issues then we do suggest disabling your bike's PAIR Valve system.