Hi all. I have an 03 Sportster 883 hugger. I would like to change the exhaust. The exhaust i got has no O2 bungs. Currently, on one of my exhuasts theres an O2 sensor. I'd like to eliminate it....less is more. So i spent hours online looking for an elimination module and apparently 2003 didn't have O2 sensors?? What do i have then?? If the original owner put on some kind of mod...how do i get rid of it? Or is it just easier to weld on a bung to my new exhaust? Also i must note....the O2 sensor thats on my bike DOESNT HAVE A DISCONNECT PLUG....it looks to be hardwired to to the rest of the wiring. What do i have here??

 

Upon further investigation, there are wires coming from the sensor.....and one of the wires is hooked onto the blue wire which the blue wire goes to the left turn signal. Was any of this hooked onto something on the bike?? Did i disconnect something?

There looks to be a black ground and an end hookup above my thumb

The red wire from the bundle is spliced onto the blue wire

 

I must also add: the red wire that is spliced onto the blue wire is the only thing hooked up. The blue wire is putting out 10.2 volts. The red wire goes nowhere. Unless i unhooked something...i dont see anything where it goes. I also dont understand why someone would go through the trouble of installing just one exhaust to accomodate this odd wiring. Any help is much appreciated.

 

Overall, this is what i removed from my bike. Why is it here??

 

This is what your exhaust looked like when the bike was new.
https://partsfinder.onlinemicrofiche...HAUST%20SYSTEM
Here is 2004 when the balance pipe was changed in 2004
https://partsfinder.onlinemicrofiche...HAUST%20SYSTEM
Here is the first year of fuel injection when O2 sensors were added to the exhaust
https://partsfinder.onlinemicrofiche...HAUST%20SYSTEM

So your bike didn't come with O2 sensors and unless it has been converted to fuel injection it could well be the previous owner had some way to see the out put while he was messing with re-jetting the carb.

 

I think you are right. It looks like some kind of hookup for a guage to show the air/fuel mix. Thats good news! I dont want it. Thank you!

 

I have a 1990 Glide with a 2008 SuperTrapp exhaust with O2 sensor ports, which my local friendly indy used for precisely that - fine tuning my carb bike on his dyno. I don't actually have O2 sensors, as the holes are blanked off, but that actually happened!

 

If it fine tuned your carb...what all was involved with this "kit"? I wonder bc gas is leaking from my carb currently. I havent checked it out yet. Maybe other components were involved as well?

 

I don't have anything left on the bike after having it tuned, the O2 ports were used by the dyno operators, then blanked off again once they had finished. I'm inclined to agree that those parts you've removed are the remnants of an instrument used by a previous owner, but I have no idea what else that might have involved. Does your bike run OK with it removed?

 

IT didn`t fine tune your carb, it just allowed you to view data so you could make tuning adjustments.
No other parts involved.
That sensor is irrelevant to your current carb leak