Water getting under gas cap and not draining from catch

[duegi]

'04 R1150R - Gas cap is leaking while washing the bike. water is getting down into flange around gas filler spout and not draining. Is there a dirty plugged up overfill line or does the drain off run into the gas tank?

[CycleRob]

The steel line runs through the inside of the fuel tank and exits out the fuel pump plate to an external drain. The problem is the steel piping is too small an ID and it easily gets plugged with damp dirt and rust. You need to feed in a 2 foot length of wire to poke it out. Patience is required if it is plugged up. Once the wire goes through, pipette spray it out with a carb cleaner spray, then compressed air. Of course, the line should be correctly connected and the contaminates should exit through the drain tube that exits behind the right footpeg.

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[duegi]

I hadn't taken the time to look up the gas tank detail on any BMW dealer sites and figured someone had performed a fix. Too small id drain tube, somewhat typical but cie la vie. Worse things could be going on with the moto.....
Thanks lots!

[momentman]

Confirming my experience that its a blockage of the steel brake line.

[duegi]

With a syringe, I carefully dripped some penetrating oil into the drain hole and watched the exit tubes below. Saw a hint of discharge and then blew the works out with air compressor, now all is well...