carb piston "apertures"

OK, I installed a new (correct) piston for the 2/4 carb, and that seems to have solved the mystery of my low EGTs on #2 at idle.  The engine seems to run much more smoothly now at all rpms, although a complete new sync may have something to do with that too. ?

I seem to remember someone else had low EGTs on just one cylinder at idle in another thread.  I will suggest that he inspect his carbs very carefully, specifically the carb pistons.

Interesting!

Thank you for the update!

Tyler

Trying to track down the CSIR you submitted and need to know what engine S/N you used?

Thanks!

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