Another vote for float level. First set to factory specs. Then if it still overflows,turn that part upside down and bend the tang to raise the floats when it's upside down. Do that in 1/8" increments till the overflowing stops.
Ask me how I know...
Just went through all that last weekend.
Gas everywhere! Scary mess.
With the floats set higher, the gas level in the bowl is actually lower, so it won't overflow.
And I guess there's still enough gas in there for the main jet to pick up.
It worked for me.
