open nipple on fuel sending unit

[boltact270]

I just rebuilt the carbs on my 80 gs 850 L. replaced the petcock too. I just noticed there is an open nipple on what I beleive is the fuel sending unit under the tank. I assume there is a hose (fuel or vacuum?) that goes to or from that nipple, but I have no idea where it goes to or comes from. Can anyone give me an idea? The last owner really jacked up the fuel system on this motorcycle. Thanks!
Gary

[chuck hahn]

Over flow in case the tank seals fail..drains back along the frame and down by the swing arm..get a long chunk of vacuum hose and route it as neeeded.

[boltact270]

thanks Chuck! I was pulling my hair out trying to find a diagram online. You are the man!

[chuck hahn]

Got 3 bike with them..If you notice the half moon bowl is just a trap of sorts to catch the fuel if the seals should fail. Dont feed the drain near the exhaust either..more to the center of the swingarm and between the tranny housing.. in that general manner..Im guess you cold also go down the frame..just be concious of where it will drip if it should fail..you know what i am trying to say.

[chuckycheese]

Yikes

Just don't get too worked up over not having it on there. If someone gave me 10 bucks to remove mine for a year, I'd take the money and run.

[chuck hahn]

LMAO..they very rarely fail..till you got the ten bucks in your pocket..LOl Just having a good laugh bro.. still dont need the risk of gas dripping on the engine them sparking up under the nads.. LOL

[BassCliff]

Greetings and Salutations!!

Hi Mr. boltact270,

Have a look at this article: Where Do These Hoses Go?

Now let me dump a TON if information on you and share some GS lovin'.

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Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

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Thank you for your indulgence,

BassCliff

[Nessism]

Dont feed the drain near the exhaust either..more to the center of the swingarm and between the tranny housing.. in that general manner..Im guess you cold also go down the frame..just be concious of where it will drip if it should fail..you know what i am trying to say.

Yes, this is why you don't want it down the centerline of the bike; if the seal fails you don't want gas slicking down your rear tire.

[chuck hahn]

its gotta go somewheres Ed..and me personally would rather it NOT be on a hot surface that can make me be mounted on a mulitov cocktail. I ahve had crabs overflow and slick down the rear tires before..to me, its a much more favorable situation.

[Nessism]

Route it back and to the side of the rear tire chuck. I've got all my overflow tubes going like this and there is plenty of ways to route them without fouling with the exhaust.

[rustybronco]

The last owner really jacked up the fuel system on this motorcycle. Thanks!
Gary

Really? something like this as well?

[boltact270]

Wow. Thanks for all the info guys. You've saved my tail. Rustybronco, mine wasn't quite that bad, but definitely bad in its own way. i had about about 12 feet of plastic Lowe's air hose carrying fuel all over the bike through 3 or 4 shut off valves I couldn't get to! Thanks again to all for the advice. It's gonna get me back on the road.