Problem: I have a brand new carb for my XR, and it seems that when you turn the fuel on, it fills up the bowl and then overflows. What I know: I know that when the fuel fills up the bowl, the fuel is supposed to raise the float, shutting off the gas intake, therefore not allowing the fuel to raise above the overflow needle and... Well... Overflow... Possible fixes??? Is there an adjustment to set the float height on this model? Is there any other adjustment methods that I should be aware of? Thank you in advance for any help.