Mine was red stuff as well. I agree that is ethanol residue..
I tried hard to save the original #40 pilots, but I couldn't get 2 of them clear. I could run a wire through them, but ultimately that would open the hole and cause a tuning issue
Clean with thin wire must be OK without damage anything.
Try that first. Pilot jets and needle jets. Also thin wire from air jet at rear against filter.
There are small holes in carb body above floats that can be clogged to.
Thin wire and needle jet removed. Good idea to remove air jets too before cleaning the carbs with small wire that chemicals might not remove.
All small air holes must be clear to make the carb to work as designed.
Hondaman explained this with photos in another thread.