I may have missed it somewhere in the last discussion of the YF, but here is another. I have have four on my bench right now. On one of my two 964S carbs to be used on a 216, I cannot get it to idle down to the 450 to 500 RPM range. Runs well eat 6 - 800 but that is as low as it will go. Accelerator pump system works well, have idle mixture functioning, runs smooth but won't idle down. I checked the mechanicals all seem to be assembled correctly.
Would this be a main jet and rod adjustment or the wrong size opening on the jet?
