Keihin PD26 carb from a CB125T. Bike sat for many years, cleaned and rebuilt carbs, all new parts except floats. Bike ran great for the first couple of short rides.
Now, left side carb floods as soon as you turn on the fuel tap. Disassembled, check float height, all good (12mm). Float needle moving free. With carb off and float bowl off, gently blew into a hose connected to fuel port while moving the float up and down, and float needle appears to be sealing fine.
Removed float, immersed in water, no bubbles. Dropped in a bucket of gas, floats.
If the float needle seals (it does), and the float floats (it does), what am I missing?? This is a plastic type float, bear in mind it sat for many years. Could the float have "gained" some weight somehow over the years due to porosity or something? But the fact that it floats in petrol means there is no reason it shouldn't be closing the needle?
Tell me I'm missing something obvious, because I'm losing sleep over this. And of course new floats seem unobtainable.
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