[Marke123]

Hi Guys,
I would like to see if there any suggestions to try and resolve an issue with really poor fuel economy that has suddenly occurred.
I'm getting 140- 150 km before the green lights comes on compared to about 200 km normally.
The best would be 220 km for gentle touring and maybe 180 km for commuting.

History:
Balanced 1200 injectors at 23,488 kms.
AF-XiED fitted at 24,000 kms. I couldn't get the plug in R1100S with connectors as it's not longer supplied.
Instead it's the Universal unit where you cut into the wiring loom.
I initially I set the AF-XiED to position 7 (recommended).
I had some issues with the bike not free returning to idle at about 2K and posted a thread at he time.
At this stage no issue with consumption, just the hesitation returning to idle.
All was good.
A Staintune exhaust was fitted at 26,320 kms
I'm on 29,000 km now.

3 tanks ago I changed the setting to position 5 as I was getting poor economy (150 km until green light comes on).

This should make the bike leaner. The lights flash 5 times on start sequence to show setting.

I'm not saying the AF-XiED is the issue.

Things I need to check:
- valve clearance (was done 17,560)
-TB balance (was done 23,400)
-check all plugs are firing (iridium plugs fitted 13,777).

I will get to this soon but the bikes starts and runs well. Doesn't have extra vibes.

I wonder if I haven't install the AF-XiED correctly or can the O2 sensor fail or maybe the connection from the mototronic to the AF-XiED has broken?
It's seemed to have worked for 3,000km.
The unit gives all the correct lights for starting up and acknowledging the setting.
If I blip the accelerator an orange light comes on and off so it seems to respond to different O2 levels.
It appears I have cut into the power correctly (unit powers up) and cut into the O2 sensor as the lights change when revved.
As mentioned, it has been good for a while.
But I wonder if the sensor is good or if there's air leaks in the exhaust from the Staintune?
No leaks where the headers join the Staintune with gaskets.
There is some leakage at the pipes go vertical but it's after the sensor.
Where do I start?
It appears to have occurred 3,000 since fitting exhaust and AF-XiED so probably not related.
How can you tell if the O2 sensor fails?
I don't believe there's an engine warning (FI) light on these bikes so how do you know if there's an issue?
How can you test a O2 sensor?

Any thoughts?


Regards Mark.