Have to check for little burrs at the pin interface
I actually chocked a q tip in a drill with a small amount of degreaser on the tip and polished up the float needles seats. They look really nice inside. Carbs are so frustrating when they don't work right.
Edit: oh wait you mean the pins not the needles! I will check that. I couldn't feel any burrs or resistance or anything when I moved the floats by hand but that's probably a poor measuring tool haha
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When you do that you destroy the shape of the mating surface. It will take a long time for them to wear back in so that they seal. You have to be a little more selective about certain advice given on the internet. Especially when it involves using power tools on extremely tiny precision parts. Had you simply cleaned these gently with chemicals and finger power they would be fine.
Of course they still might work. Please, everyone stop the overflowing float madness. Everytime you disturb the carburetors it is gonna take a bit for these tiny float valves to settle in and start working correctly. So, when your freshly rebuilt for the third time carbs piss gas
1. Shut the petcock off and run the engine until they stop pissing, turn the petcock back and see what happens, repeat.
2. Smacking the float bowl with a small weight of some sort or any general movement or vibration of the bike (i.e. riding in a safe, controlled environment!)often is all it takes. Give them time. Turn the petcock off and on to control fuel loss/mess.
3. Turn petcock on let the bowls fill till they overflow. Turn petcock off. Remove associated bowl drain screw. Turn petcock on and let a considerable amount of fuel flow out the drain. Turn petcock off. Replace bowl drain screw. Try it again. Repeat.
If you have completely gone through these three steps several times and you still have overflow, you can be sure you effed something up. Tear the carbs apart and find it.
