Well that all sounds pretty positive. As I said it's really nothing more than a thought at the moment. But it sounds like it would be an interesting (educational more than anything else) project when I get home.

That demon tweeks thing looks suitably sexy, but not sure about the 230 quid price tag. I was thinking more along the lines of trying to get an old Lambda sensor from a FI bike at a scrap yard, and wiring in the leds as an indicator.

But what about this wideband narrowband difference?

The demon kit says it includes a wideband sensor, as does the DIY kit. What do they use in bike FI systems?

(Just had a read through some wikipedia articles, and it says:

"The original narrow band oxygen sensors became factory installed standard in the late 70's and early 80's. In recent years, a newer and much more accurate 'wide band' sensor, though more expensive, has become available.")

I was thinking of making up a short section of tube that would be clamped in between the existing header and silencer. This section would have the hole drilled and boss welded. This way it'd be removable, and hopefully easier to bolt on to a different bike. Plus no mods needed to the exhaust components that are on the bike at the moment.

Ebay.com has some stuff. I searched wide* lambda* and found 150 buck sensors, or kits for 200. hmmm