Fuel leak at bottom of petcock valve 2000 fatboy

Did you put the shear pin back in the slot?

it sounds like you petcock vavle ( your fuel shut off valve) is the problem its easy to change i would really keep a i on it no fuel leak is a safe thing to have.

If you have gasoline in the oil tank after sitting for two weeks, you probably have a bad petcock. In 1996, Harley went to a vacuum operated petcock. They are notorious for leaking fuel. Additionally, you have a problem in your carb. Either the needle and seat are not sealing and leaking fuel into the carb or the accelerator pump diaphragm is bad causing the fuel to seep into the engine.

Once the fuel seeps from the carb into the engine, it will get past the valves, and the rings on the piston and into the crankcase. It will sit there until the engine turns over. At that time, the oil scavenger pump will pump it into the tank.

I suggest you replace your petcock with a high quality manually operated petcock such as a Pingle, have your carb gone through by a competant mechanic, and change your engine and primary lubricants.

Good Luck
Steve

Replace the petcock. The rubber diaphragm is ruptured. I'd also bet your fuel mileage dropped cause the ruptured diaphragm is allowing raw fuel to be sucked into the intake manifold.