Gas in the oil

I checked the oil and the crank case was full of gas. Changed the oil and put 2 gallons of gas in the tank. Started it and with the eng running within 2 min all the gas drained to the crank case

This bike is a 99 FXDX with 5000 miles It has the 88 eng, not fule injected

Need more details including year & model.

Don't know a lot about that particular model but I'll tell you what I do know. The valve on Harleys that's supposed to keep oil from draining down into the crankcase from the tank ain't all that great & especially when a bike sits for long periods of time, can & often does fail. Gasoline can get into the oil for several reasons, but 2 gallons in 2 minutes makes no sense @ all. If everything is hooked up right it's not possible, even if that valve is bad.

and the bike was running at the time. Have not changed anything on the bike and it has allways run good. Now it does sit a lot. Less than 5000 miles on a 1999.

Then the valve that's supposed to keep oil from draining down into the crankcase would be the 1st thing I'd check. Then the oil pump & lines - Harleys have a "dry sump" oil system & the pump is supposed to "scavange" oil from the crankcase, return it to the tank & keep the oil moving all the time when the engine's running. Harleys don't need much oil pressure, but they do need lots of oil flow (for cooling) & the system is designed for high flow, not high pressure.

Then I'd pull the float bowl off the carb & check to see if there's any trash in there & if the needle & seat are in good shape. If the needle tip is worn and/or if there's trash in there, the needle won't close all the way down on the seat & gas will not stop flowing when it should.

Thanks I'll check it.

I had a problem like that in my Ma's lawn tractor,the float in the carb was stuck,filled the crankcase full of gas.....

Did it. all was clean and the float works

Is the float level correct (factory service manual)? Is the needle closing all the way down on the seat?

i've had problems with needle valve seats on holly carbs on cars. you can look at it and it will appear normal, look like new, but still give you hell. in your case thats alot of gas!! does the bike run right? how would the crank case hold that much?? can a bike possibly flow that much gas?

i guess i someday need to tear an engine apart, because i'm at a total loss as to where 2 gals of fuel could fit into an engine thats already full of oil. somebody help me understand this, i'm missing something here

I do not know. I put 2 gallons in the tank. opened the gas valve and started the bike. 2 ,minits maybe 3 no more with the bike running the gas was gone and the crank case was full of gas and oil. It ran ok. How can that much gas pour through the heads without flooding it out?

I have not changed the pluming, and the bike has allways run good. If take the air filter off and open the gas valve, no gas pours into the heads. I did not look in the carb while it was running. But no, I'am not going to run it again untill I fix it. Ordered a shop manual yesterday.