[ryanheacox]

I had a pretty major carb leak over the summer. Turned out my problem was that the float valve had worked itself loose ever so slightly, I tightened it up and now it doesn't leak a drop (of gas). It might not be your problem but it's a quick and easy fix if it is. I'm pretty sure the original valves were not rubber tipped, there are aftermarket ones that do have a rubber coated seat.