I looked around, couldn't find anything on the power jet size per application.
I found this listing that offered several sizes. They sound big though, probably for adjustable mains.
There are several suppliers and rebuilders online. You might make some calls, see if they have the info or an professional opinion based on engine size.
You may have to make a guess, start small and buy a set of jet drills, work it up .001" at a time until it will take responsive throttle without hesitation.
I did see the designation "A" indicates fixed jet.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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