Went out for a ride today, just noticed a fuel puddle on the floor. Not coming from the exhaust, was pretty much right under the carb. I'm wondering, generally speaking, what is usually the cause of this? What would cause fuel to either blow back out or just collect somewhere then leak out later? The black air filter was a bit wet at the intake tubes. I'd say there was at least a level tablespoon on the floor. I ran it out of fuel before bringing it in, so it seems likely that all of it dripped out of the filter mesh.