OK - have read skimmed through the bumpf on Optimiser and LC1 and must have missed it. Is there a way of displaying the AFR instead of voltage on the Optimiser LCD?

If I remember correctly it was done by reprogramming the probe output. I don't have a LC1, but the WBO2 product I'm using features something like that (with the help of Excel files, btw.)
Hubert

Thanks - I'll need to have a proper look at the LC1 manual again next week.

Go here and scroll down a bit. Your unit should offer something comparable:
  http://wbo2.com/2a0/default.htm

Hubert

After a closer look I think that reprogramming the output to Lambda f.i. probably is not a really good idea. As the Optimiser only shows the voltage it makes no real sense to decrease the output/resolution from 0-5V to let's say 0.8 - 1.2V.
I also can remember the lines you mentioned about displaying a 'real' ARF factor, nevertheless I also couldn't find them now.

Hubert

Yup Hubert - sort of drawn a blank in the LC1 - it has 2 analogue outputs but...
LC1 Manual excerpt:-
5.1 Analog Lambda/AFR instrument.
There are many analog lambda/AFR displays on the market. They are essentially voltmeters for a
voltage between 0 and 1 V and measure the analog voltage of a narrow band oxygen sensor.
Some are true analog instruments while others provide a LED bar. Because of the very limited
sensing range of a narrow band sensor they are essentially useless as true AFR meters. With the
LC-1, connecting these meters to the second analog output of the LC-1 allows them to be used
as true remote AFR meters, provided the LC-1 analog output is programmed to the
characteristics of the used meter. The LC-1's analog output 2 is factory programmed to provide a
linear output between 0V and 5V for an AFR of 7.35 to 22.39. Any other linear output range
between 0 and 5V can be programmed. See chapter 6.5: Programming the analog outputs for
details.
As my bike is still in bits I can't experiment but it seems a non starter unless someone knows better... ::)
The reason I asked was that voltages are fine if you do some mental arithmetic whilst on the road but afr would be a "nice to have" in my book. I must be a 'Luddite' but afr seems more, well.. visual than a voltage. I have a bit of label with volts v afr stuck on the dash to allow me to sort it out relatively easily. It's not the end of the world if it's not feasible easily.
I started to strip the bike down in January to cure the gearbox whine and slowly it has broken down into more and more component parts as I strip and clean and paint. The first time in probably almost 2 decades since Luigi put it together than some of the fasteners have been taken apart. Need to draw the line soon and start re-assembly - mind you it's cr@p weather here so not missing much just now.
Gavin

I started refurbishing a 750S probably 10 years ago - I'm glad I have another bike ;)

Have you checked chapter 6.5, btw ?

6.5 ! - that's where I saw it. I'll need to get the bike rebuilt to have a play now.

The trusty ST1100 Pan - armchair stuff compared to guzzi grin - is available for taking out for a bimble should the weather allow.

I run for a year or more with AFR shown. Very easy. Sometimes I think the reduction in resolution is actually a good thing. But last year I just used LC-1 defaults and now I don't even have an Optimiser anymore (or did I buy a new one? Can't remember).

From the very first post of the "mega thread" on v11lemans.com:
To read actual lambda or AFR values in the Optimiser display, you have two choices: either set your sensor to output voltage=lambda (eg. 0.87 volts means Lambda 0.87) or set it to voltage=AFR-10 (eg. 2.74 volts means AFR 12.74). Both has drawbacks compared to the LC-1 default: using voltage=lambda, you don't use much of the possible resolution (on the other hand, this results in some damping that may be of benefit). Using V=AFR-10, you can't read richer than 10:1 or leaner than 15:1. That range should be enough though, and you use all available resolution. I've tried both, but currently I just go with the LC-1 defaults.

Thanks Raz - you have put me out of my misery - as usual. I knew I had read something, somewhere, about optimiser afr display but couldn't remember where. I did look at the V11 forum and even tried a forum search! Completely missed it for some reason - paint fumes? :D

There is some really good stuff on that mega-thread which new users (& older ones ::)) could be pointed at.