That was Tom Kirkham that posted the PDF.
I trust links only a few days - then many seem to find themselves broken.
This is a worthy download. Even if you don’t have Weber carbs, this illustrates the theory of operation very well!
Even if it is a long road to tune the Bolonga Webers I think it is worth it . And now I have the engine in a test bench, it is the ideal condition to tune for max power and in the middle area. The idle can be done home in driveway. I will experiment with the smallest main jets and drill them up if needed and the same with the air corr . one should have a full suitcase with all jets emulsion etc. to find the best tune up.