Unfortunately, the Bazzaz system is a piggyback unit, which means the Ducati ECU still needs to be functioning in order for the bike to run properly. If you unplug the 02 sensor, the stock ECU will default to a entirely different map. It's similar to a limp-home map, rather then a "performance" map. You have to disable the 02 sensor functionality on the Ducati ECU to remove it. This can be done using the Rexxor re-programmer or sending your ECU out to a service provider who will flash it for you. In doing so, you can put a proper map directly onto the ECU, so there is no reason to have a piggyback tuner like the Bazzaz.