Removed mine as the Arrow headers come with plugs, another useful feature of Arrows is it makes mapping each cylinder much easier as there is no balance pipe in front of the sensor holes so CJS could use the Arrow holes for putting their wideband sensors in during dyno setup.
Asked Chris about the Sensor removal and got this:
The o2 sensors are there for one purpose. That's to ruin your ride to keep Mr Euro 3 happy.
I guess we all know that, for the US folks Euro 3 is the latest emissions regs from the European parliament that controls 90% of UK laws these days.
With o2 sensors active you cannot richen up the lean spots in the 2000 to 4000rpm range and fix your ride because the sensors will grass to the ecu and the ecu will take the fuel back out - this is in simple terms
The sensors are actually narrow band sensors, they are slow and twitchy.
Sounds like my riding style.
If the bike had real oxygen 6 wire wideband sensors like a bosch ecu with real self learning capabilities you could simply go to the target AFR map set it to what you wanted and the ecu would learn and adapt that new value in ten mins riding
This is how the car reflashers can get you a reasonable ride without seeing a dyno
I assume this is applicable to the Dynojet Autotune systems :question:
With the ECU-U Flash I had tried with the sensors connected and disconnected and tried O2 eliminators and the surge remained whatever I tried, and although it was not too hard to avoid / ride around most of the time it bugged the hell out of me.
Although I have still not got used to it not being there and often find myself "bracing" for a lurch that never happens when I let the revs drop to the point where it used to surge.
