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FUEL LINES
Well, the time has come. I have sprung a serious gas leak left bank. I can see a steady stream coming from one of the lines between the carbs. I have a manual and will search it, but I wonder if you guys can tell me how difficult a project it will be to replace all the fuel lines. I suppose I have to pull the carbs?
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#1 06-15-2012, 02:17 PM,
bill, you would need to pull the carbs if the o-rings are leaking on the tubes between the carbs or if the fuel is coming out the overflow on any of the carbs which would indicate dirt or incorrectly adjusted floats or worn out needle valves and/or seats. Sometimes this can even cause hydraulic lock on a piston because the gasoline fills a cylinder and prevents the piston from rising due to the gasoline filled cylinder locking the piston. Even if the gasoline seeps past the piston rings into the crankcase it can still cause hydraulic lock under the piston if the crankcase fills with gasoline forcing you to drain and refill the crankcase with fresh oil after gas leak is repaired. Have a really close look and determine precisely where the spilled gasoline is coming from then come back and let us know so we can help you further. To simply replace the fuel delivery hoses you do not need to pull the carbs and replacing those hoses is not a big job at all.
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#2 06-15-2012, 02:35 PM,
The gas is coming from one of the lines. No leaks at the carbs. I just need to change the lines.
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#3 06-15-2012, 04:55 PM,
Well now, that's good news bill.
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#4 06-15-2012, 05:09 PM,
I assume I can get to them after I pull off the faux tank?
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#5 06-15-2012, 05:32 PM,
The gas lines are at the rear of the back carbs, so no need to remove the faux tank. One hose comes from the fuel pump then goes into a T then a molded hose goes to each carb. You can do away with the molded hoses by allowing a wide radius in the new hoses. May I suggest that you use fuel injection hose because it is sturdier and will hold its shape better when you make the radius at the 90 turn. Also, I use fuel injection clamps because they work better and look prettier than gear clamps all for just a few pennies more.
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#6 06-15-2012, 05:48 PM,
Thanks. Looks to me like I can't get in there with my big hands. But...then I'll take another look tomorrow. Then off to buy fuel line and clamps.
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#7 06-15-2012, 05:58 PM,
New info. When I opened her up to get a better look I was surprised to find that the leak was not where I thought. It's here:
[attachment=0]

Now the questions is this...do I have to pull the entire carb assembly to replace this?


Attached Files
.jpg   carb leak.jpg (Size: 93.88 KB / Downloads: 313)
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#8 06-16-2012, 09:56 AM,
[attachment=0]Yep. Order new intake manifold o-rings and new carb to carb transfer tube o-rings, don't re-use the old ones else you may get leaks and drivability problems. Sometimes alcohol in the fuel or fuel additives can cause the o-rings to dry up and fail.


Attached Files
.docx   carbs.docx (Size: 43.26 KB / Downloads: 25)
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#9 06-16-2012, 10:26 AM,
Just to add to what Vic has said, you should also replace "ALL" of the vacuum hoses and tubing while the carbs are out. Also have a good look at the P.A.I.R. valves for being gummed up and look at the air cut off valve. Best to do it now instead of later..... Good luck Bill!

Take some pix of your progress for the archives.

Sent from my PC36100 using Tapatalk 2
Adam
'96 ST1100
Brewerton, NY
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#10 06-16-2012, 10:45 AM,
Good advice Adam. If it was my bike I would view this leak as an the opportunity to inspect and rebuild the carbs as well as all the carb peripherals, but, that's just me.
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#11 06-16-2012, 10:51 AM,
Wellllllllllllllllllll...Since I don't have a shop with AC this will probably be a chore for the dealership.
#-O #-O #-O :-SS :-SS
I'll let you know.
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#12 06-16-2012, 11:07 AM,
Hi, hope you don't mind me asking a question on fuel hoses while on this subject, is there a preferential material for fuel & vacuum lines? I have seen some made of braided steel & some made of silicon. As I am in the process of a full rebuild I would like to fit the best in quality along with securing clamps I can get but would also like to fit hoses with some 'dressage ' to them.

Thanks
Paul

PS apologies if post appears twice, had computer glitch just as I was posting.
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#13 06-16-2012, 12:20 PM,
I expect I'll go with the braided steel. Might as well go the limit if I'm gonna do it.
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#14 06-16-2012, 12:44 PM,
Neoprene or Viton material is the best/most suitable material for fuel and vacuum hose on our bikes. Stay away from natural rubber hose because oil and gasoline attacks natural rubber and can dissolve that material in very short order. Braided steel hose, with the correct hose material inside, is a very slick way of replacing existing fuel lines, especially if you go with the really trick hose clamps that make the hose look like it has crimped fittings on the ends. $$$$$ Post a picture when you've got the job completed bill.
Ed (Vic) Belanger - 1954-2015
Founder of gl1200goldwings.com

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#15 06-16-2012, 06:35 PM,


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