This probally doesn't relate to your problem, but it's an interesting tid-bit behind some some of those gremlins that get 'cha.

In the mid 80's I had a problem with my quad loading up at idle, and if you you'd gun it a few times, it would clear up. When it wasn't loading up, the carb was right, able to dump full throttle from idle. Often, however, the **** thing would load up at idle.

When I'd remove the air breather, you could see that the feul bowl was flooding, and the gas poured down the venturi. I played with the float, setting way low. Even so, nothing helped.

One day when it was loading up, I pulled off the lid for the bezillionth time. When I touched the float, I noticed that the seat was binding, and the Jesus clip mad it bind, so I took the Jesus clip off, half the reason was to try it without it, and the other half of the reason was to get a new Jesus clip.

(The wire clip that goes from the float to the seat is called a Jesus clip because when you take it off, and it flies away, you say, "Jesus Christ! Where did that son of a ***** go?")

Anyway, that was about 15 to 17 years ago. I have never been into the carb since, and I have never had a problem since. I'd thought I throw this in so if you have a loading up problem, it's something to check.