So Dave, you are now a certified member of the whole crowd of people who are "diligently looking for the very first Raptor gas in sump episode".
There are many many many of us and
we are all looking jest as hard as we can.
We will find it, eventually ..... and when we do we will tell everybody all about the circumstances surrounding it.
Let's see --
it is very hard to park the bike pointing downhill as the kickstand only works when the bike is level or pointing uphill, so we tend to park the bike pointing uphill if ground tilt is an issue at all.
Next, the bike is always tilted sideways on the kickstand, which puts one of the float bowl overflows a bit lower than the venturi anyway.
Next, the venturi itself is a cone with the small (higher) end towards the engine and the big end towards the air box.
Between the bike facing uphill and the bike being tilted to the side and the venturi being a cone with the taller side towards the engine, not much gas is going to climb up all those slopes to get up to the intake valves, which have to be open for the gas to drip into the cylinder, BTW.
Spring pressure on the valve train and engine compression tends to make the engine kick back gently at close down to make sure the intake valves are shut -- that's what kick back is, compression and valve spring forces rotating the engine backwards towards piston bottom dead center, with the valves closed.
Ain't kickback nice, especially since every big single has it as a built in feature.The air box itself can hold a lot of leakage drops that naturally do run down hill into the air box,
drops which will evaporate at about the same rate a leaker float valve assembly would release them. Remember, a bad leaky float valve assembly leaks at a slow drops per minute rate, not a steady drizzle like a failed vac diaphragm would do.
In any case, we will all keep diligently looking, especially those of us that don't always turn the Raptor off because we are jest plumb too lazy.