What is "idle not perfectly steady"? To what degree? Was there actual improvement after petcock renewal?
I'll still submit further tuning, an accurate carb synch followed by setting the pilot screws with the bike hot will nail it down further.
Going forward, monitoring the fuel consumption a good indicator of overall system "tune" as well. And using an ethanol additive/stabilizer in every tank will keep the carb circuits truly clean. I've had really good results with the Stabil 360 Marine (as I've raved about before)
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