There's an issue on these bikes with mapping them once they've reached a certain temperature, in that its next to impossible because the ECU switches modes.

I was thinking Kev...

You say that it switches from closed/open when the O2 sensor is disconnected with and without an O2 eliminator.

What about when the O2 sensor is connected, does it still do it then?

Furthermore, if say I was to cross a couple of wires from my autotune to the O2 sensor plug so that the ecu is getting an O2 reading, would that make any difference?

From the tests I did lately I found on my 11 ECU, the O2 eliminator made no difference connected or disconnect to the A/F ratio when the O2 sensor was disconnected.

This may sound daft Kev...probably due to a lack of knowledge, but here goes...


Surely, if the O2 sensor was removed from its location, and put into a "sealed environment" (cover the whole thing in something that would not allow heat/air in) and the hole blocked off, but stayed connected, the ecu wouldnt switch mode, it would stay in one of those circuits?
Would throttle position affect it? If so, would it be possible to tell the sensor it was, for example, on a low throttle position, by changing the throttle reading...hmmm..this is getting too technical..

Forgive me if it sounds like gibberish!!

Anyway, back to the thread......According to UPS Couriers online tracking, the DNA airbox is arriving today, and a friend whom I told about what I was doing, has volunteered to keep me company (read "give me a hand") later, to fit the airbox and Cans, and block the AIS.. The PC111 is already fitted, just needs setting up. So....I'll keep you posted when its up and running, and then when it returns to the Dyno hopefully later this week.....

[quote=richardsracingmad;133660]This may sound daft Kev...probably due to a lack of knowledge, but here goes...


Surely, if the O2 sensor was removed from its location, and put into a "sealed environment" (cover the whole thing in something that would not allow heat/air in) and the hole blocked off, but stayed connected, the ecu wouldnt switch mode, it would stay in one of those circuits? If the O2 sensor is removed & is still connected it will give the ECU the incorrect A/F ratio reading, this will throw the CLOSED LOOP mapping all over the place.
Would throttle position affect it? Throttle position effects the open & closed loop circuits, once the coolant temp reaches 70 C. If so, would it be possible to tell the sensor it was, for example, on a low throttle position, NO by changing the throttle reading...hmmm..this is getting too technical..

Forgive me if it sounds like gibberish!!

Anyway, back to the thread......According to UPS Couriers online tracking, the DNA airbox is arriving today, and a friend whom I told about what I was doing, has volunteered to keep me company (read "give me a hand") later, to fit the airbox and Cans, and block the AIS.. The PC111 is already fitted, just needs setting up. So....I'll keep you posted when its up and running, and then when it returns to the Dyno hopefully later this week Looking forward to the results.

Sorry Kev...I'll try to stick to the thread!!! But thanks for the answers!!

I'm wearing a groove in the hallway floor..................:blob7:

The thread is yours so ask away.

I have spent a few years studying how the XT660 ECU's work & how they are programed, the only one I have not got my hands on is the XTZ's ECU.

so theres no chance of doing something like what I said earlier?

with running some wires from the autotune wideband sensor to the O2 sensor plug on the bikes loom?

What'd that do to the bike?

Haven't tried it, you are the only person that I know who has a Auto Tune on a XT660. Wire it up & let us know how it works.

does that make me special?


:drool::drool::drool::drool::drool::drool::drool:: drool::drool::drool::drool::drool:

Yes. As im schpeshall :P

But let us know how you get on !