XJRider.com

So I'm in the process of cleaning my carbs and its just one thing after the other with things going wrong, stripped screws and all the usual headaches. I finally start making some progress and get to a point where I'm unscrewing the little screw that holds in the float valve seat, I get those buggers out and then go to pull out the float valve seat with a vice grips and nothing, hardly budging. I sprayed them with some PB blaster to see how that worked and I was finally able to get out one of them, but the remaining 3 are really freaking in there!

So whats the deal? Am I really that weak or is there some trick to getting these bad boys out? Thanks!