Exactly. Something is floating around in the tubing and gets lodged over time. Or gets saturated and swells up over time. A piece of paper towel may have found its way into the fuel line.
Don't ask...Or the obstruction allows fuel to pass, but at a greatly reduced rate. Thus when you let your motorsickle sit after it's
spring moment(s) the fuel will eventually refill the bowls. If your intent when draining the bowls with the fuel tap on per Ed is too observe fuel flow, then the intention to drain a healthy measure of fuel (the entire tank) will force you to get you past the rush of what fuel is already in the bowls and truly observe if a real fuel flow event is occurring Apparently, you have only been observing the fuel that had already seeped past the blockage.
P.S.: The odds of BOTH float needles sticking are very remote. Has yota been playing with your sickle?
