This is an alternative to switching the stock ECU into Map2 / Racemode 3
The O2-optimizer gets pluged into the stock-O2 Sensor. The stock O2-Sensor has to stay in the collector! The O2Optimizer is a small digital module that interfaces with the bike's O2 sensor circuit and ECU. It allows the Power Commander to correctly adjust the normally fixed "closed loop" area (throttle openings of less than 33% and below 4500rpm) of the fuel curve. Without this device, the bike would be locked into an overly lean condition in the above throttle and rpm ranges.