Flooding but not flooding enough to dump out of the float bowl overflow tubes? Most of the time those float valve needles are okay, and you just need to take out the whole float needle valve assembly and replace the oring that seals the valve. These guys can become brittle, harden and even crack and begin to leak fuel past the float valve body. I don't know what size oring it takes but you can buy a whole pack of em for around 5 bucks at McMaster carr. When those orings go bad it will give you similar symptoms to a stuck float. It can be very misleading because a lot of the times it will not be bad enough of a leak to pour fuel out of the overflows and it will just feel like you are rich as hell and bog down leaving stop lights etc. If the float needle has a nice conical shape to it still, it is most likely fine and you just need to replace the oring. I did a quick search and unfortunately couldn't find anything cheaper than $35 for an entire float valve assembly.
Buddy of mine has an 85 yamaha FJ1100 with close to 50k miles and the float needles in his carbs still look fine, but he did end up having to replace the orings because they were leaking past the valve.

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