Tuning the 900 using the dashboard buttons

[toddy]

From my limited understanding, you're right in saying that it would be pointless putting the sensor probe after the cats. When I got mine done I undid the access bolts between the headers and the cats and put the probe in the hole. It appears that there is such a variation in everyone’s final settings that a proper reading needs to be done. The readings between the left and right don’t necessarily match up either...