thank you Jim, great info once again.
i really had hoped for a place to buy these parts new and in logical order from lean to rich,
but i guess that would be too easy...?
i was running 159-59S mains in my triple carb setup on the 265. these were too lean at cruise. 159-61S were better, 14-14.5 AFR.
the engine was drowning in fuel above 3000rpm and under heavy load in overdrive, i experienced 10,5-11 AFR, intolerable.
i tried two sorts of step up jets, 149-113S (leaned out the cruise too much and still flooded under load) and 149- 43S (too much in general)...
i can see the logic behind the numbers on the main jets, but the ones on the step ups don't quite add up for me.
funny thing was that somehow the test results were not exactly what i had expected, especially changing the step ups had far bigger effects
over the whole rpm range than i had thought before.
good to know your measurements now, i will check the orifice diameters and then try soldering and drilling as well.
another thing i did on my first triple setup on the old 201 was putting weaker springs into the step up jet assembly, allowing it to stay shut just a little longer.
on the smaller engine that gave me pretty good results and the AFR was in an acceptable range.
thanks for taking the time and sharing all your measurements!
Fred