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I could do with some recommendations for reading matter, please. I'm about to start on my BMW K100 projects (got 2 of them). All the bikes I've worked on in the past had carburettors, and the Fut is dealt with at Aprilia Performance.

These K100s have an analogue fuel injection system - Bosch Jetronic LE. I'd like to try to comprehend it a little better before I dive in; the Haynes & Clymer manuals have some information, but I really would prefer to get to grips with the whys and wherefores in advance - get an overview of EFI systems, especially these early ones, to help me grasp what is - or isn't - going on.

Any recommendations for books/manuals on the subject, please?

i think a lot of early injected cars used bosch le jetronic systems xr3i,3 seires bm,s ect probably the same system but maybe more info on the net than the bike systems

This is a good start Martin and at least we have some schematic diagram to follow if need be

http://www.205gti.com/bosch/index.htm

That looks pretty useful, Curt, thanks. Someone sent me this text description of the system http://opel-scan.ru/files/Bosch_LE_Jetronic.pdf ; these two items should help get me at least part way there.

If you haven't already looked then i suggest you can also try the 'Motorcycle Fuel Systems Techbook' which is a Haynes book but it covers all the systems from carb to injection, airbox to exhaust.

Nice one Paddy; just the sort of thing I was looking for.