No the main jet snugs up and pulls the needle jet into the correct position thankfully. It's only #2 where the threads are a bit chowdered up and not that bad, I put a bit of PTFE tape around the main jet threads yesterday just as a bit of a precaution but I doubt it was actually a problem.
The '80 carbs sat overnight with gas in the lines and I have barely seen the level drop (beyond an expected amount of evaporation). I wonder if a better simulation of the amount of fuel pressure in those lines would be to suspend a larger volume of fuel over the carbs for some more "head" to test how well the float needles are sealing before I can fully be satisfied and move on to trying out my experiment with increasing pilot air jet size (or stepping down to #40 pilot jets even). I still think it's rather odd that my '78 with stock airbox/filter and a (presumably freer flowing?) 4-1 exhaust would need LEANER than stock jets?
The '80 carbs sat overnight with gas in the lines and I have barely seen the level drop (beyond an expected amount of evaporation). I wonder if a better simulation of the amount of fuel pressure in those lines would be to suspend a larger volume of fuel over the carbs for some more "head" to test how well the float needles are sealing before I can fully be satisfied and move on to trying out my experiment with increasing pilot air jet size (or stepping down to #40 pilot jets even). I still think it's rather odd that my '78 with stock airbox/filter and a (presumably freer flowing?) 4-1 exhaust would need LEANER than stock jets?
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