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I believe that the engine of my '63 650SS basket case restoration would have had chopped Monobloc carburettors as standard. There were no carburettors amongst the boxes of bits but I do have a pair of very good condition 30mm Mk1 Concentrics that I would like to use. I don't imagine that I'm unique in this and a there are probably a lot of 650 engines around running these carbs.
If anyone could give me an idea of where to start with jet sizes, slide no's etc, it would be very much appreciated.
Thanks, John
The data below comes from the Amal web-site.
If you ring them up, they will confirm all of the data that you will require for your needs for free.
3 Cutaway Slide
280 Main Jet
106 Needle Jet
Size 17 Premier Pilot Jet
P.S. The pilot jet I suspect in your carb' body will be fixed so the Size 17 above will not be relevant.