Table of Contents

Tuning One Cylinder At a Time

If your TRO2 controller ends up malfunctioning and not working properly then you can still finish tuning the bike you’re working on with one cylinder at a time.

  • First you need to determine which TRO2 connector is not working.
  • Make sure you do not confuse this with a TRO2 sensor not working, if this ends up being the case then you can follow the steps here to tune with only one sensor.
  • Below click on the image of the situation you are in, either the yellow connector is not working, and you can only use the gray connector, or the gray connector is not working, and you must use the yellow connector for both cylinders.

**CLICK ON THE IMAGE BELOW THAT REPRESENTS YOUR SITUATION.**

  1. If the Yellow Connector on the TRo2 Controller is no longer working or goes bad, we can still finish tuning the bike using only the Gray Connector.
  2. Tune the rear cylinder as usual with the Gray Connector.
  3. Next, when ready to tune the front cylinder, disconnect the Grey Connector from the sensor that is in the rear cylinder and plug it in to the sensor that is connected to the front cylinder.

  4. In the upper left, click ‘Options’, then ‘Ext. O2 Controller’
  5. Click the tab in the upper right ‘TRO2 Faulty’, because the Yellow Connector is not working, we want to start by clicking ‘Alternative Configuration’, next you will select ‘Yellow Connector’ under VE (Front). Click ‘OK’.


  6. Now you are ready to tune the front cylinder, just like you did with the rear cylinder.
  1. If the Gray Connector on the TRo2 Controller is no longer working or goes bad, we can still finish tuning the bike using only the Yellow Connector.
  2. Tune the front cylinder as usual with the Yellow Connector.
  3. Next, when ready to tune the rear cylinder, disconnect the Yellow Connector from the sensor that is in the front cylinder and plug it in to the sensor that is connected to the rear cylinder.

  4. In the upper left, click ‘Options’, then ‘Ext. O2 Controller’
  5. Click the tab in the upper right ‘TRO2 Faulty’, because the Grey Connector is not working, we want to start by clicking ‘Alternative Configuration’, next you will select Grey Connector under VE (Rear). Click ‘OK’.


  6. Now you are ready to tune the rear cylinder, just like you did with the front cylinder.