Still leaking fuel from carb


Information and questions on GL1100 Goldwings (1980-1983)
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Laughingmad
Posts: 3
Joined: Sat Jan 21, 2023 5:53 pm
Location: indiana
Motorcycle: 1982 GL1100

Still leaking fuel from carb

Post by Laughingmad »



Hello all! Hoping to get some more insight into what can be done to fix my fuel leak. I've rebuilt the carbs, changed gaskets, ultrasonicated, and thoroughly cleaned everything I can get to. I'm still getting a leak to the outside of the carbs though. I think it's coming from the #3 carb, but im not totally sure. Any insights or clues will be helpful! If I can't get it settled in the next week, I'll send it in, but I'd prefer not to.
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Tparr
Posts: 55
Joined: Mon Nov 08, 2021 12:37 pm
Location: Dayton, ohi
Motorcycle: 1987 gl1200a

Re: Still leaking fuel from carb

Post by Tparr »

Sorry to hear you are having difficulty with a leak. I would need a little more information in order to help with your problem. While the carb is off the bike on the bench, I would take a syringe filled with white gas(Coleman lantern fuel, Naptha), gasoline being too dangerous, and fill the carbs completely. Then you could pinpoint the area fuel is escaping.
What rebuild kit did you use and what parts did you replace. Did you follow a rebuild manual, which one?
I refurbished an 83 last spring using a Randakks carb kit and a rebuild book by Mike Nixon.
Tim
southwestern Ohio
1969 Moto Guzzi v7 750
1983 Honda GL1100i
2013 Ural Gear Up
2019 Moto Guzzi v7 750
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biguns
Posts: 132
Joined: Tue Jun 14, 2022 3:39 pm
Location: Ardmore Oklahoma
Motorcycle: 1980 Interstate

Re: Still leaking fuel from carb

Post by biguns »

There can be a problem with aftermarket floats where the float frame hits the pin tower before the float actually seats , I would re inspect the offending float bowl look for sticking float needle when carbs are sitting upright the float needle should move smoothly in and out of seat with the float all the way down to all the way up.
I always fill the carbs on the bench before install, I hope you are too
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CnCbuss
Posts: 22
Joined: Sun Oct 20, 2019 5:23 am
Location: Montreal, Qc
Motorcycle: 1982 GL1100

Re: Still leaking fuel from carb

Post by CnCbuss »

This is a very timely post indeed! Sorry to hear you're having trouble with reassembly. Is this the first time you tackle a carb rebuild on this bike? It's going to be a first attempt on my part in the very near future and I could use some insight before starting my journey down this intimidating path.
I'm at the point of removing the carb bank from my '82 GL1100i and wondering where too order parts from. I need to replace the throttle and choke cables which I can get from Goldwingparts.com but I also plan to at least change the float needles while I'm in there. Have any members had luck with their aftermarket carb kits and seals or is there another option that doesn't require a small bank loan (and a huge argument with my spouse about money) to get these important parts from?
...and the meek shall inherit the earth...
Tparr
Posts: 55
Joined: Mon Nov 08, 2021 12:37 pm
Location: Dayton, ohi
Motorcycle: 1987 gl1200a

Re: Still leaking fuel from carb

Post by Tparr »

CnCbuss, about a year ago I tore into an 83 interstate. Pulled the engine, replaced seals, overhauled the carbs, belts, stator, water pump, etc. There is an abundance of information and how to's on the early wings. I spent hours on the web learning from others. My recommendation is not to cheap out on parts. For me its a labor of love and i hate to redo work. Randakks carb kit is pricey but good. I reused my 40 year old floats and needle valves. Reproduction needle valves are questionable. Get a good carb overhaul manual (Randakks or Motorcycleproject.com). Check for leaks and accelerator pump performance before installing.
I must have pulled the carbs off three times before I got them to perform correctly. The accelerator pump tubes were partially clogged and I had to torch them and use a wire to clear them.
Kudos to the Honda engineers for making the bike fairly easy to work on. I have 3000 miles on the bike now and truly love this thing.
Tim
southwestern Ohio
1969 Moto Guzzi v7 750
1983 Honda GL1100i
2013 Ural Gear Up
2019 Moto Guzzi v7 750
tomos
Posts: 115
Joined: Mon Dec 23, 2013 7:00 pm
Location: GuelphOntario, Canada
Motorcycle: Gl1100 a 82
suzuki gs400e 82
Honda cb750f 80
GL 1800 30th anniversary 2005

Re: Still leaking fuel from carb

Post by tomos »

Hi, I hope you have sorted out why carb leaked.
Any how this may help,
There is a gasket that must be replaced and it is located under bowl on carb body just beside acceleration pump.It seals passage from carb body to acceleration pump.
Second possibility is that gasket sealing carb body and fuel tube that connects to fuel line from fuel pump is dry or broken.
That area is wet as seen on one of the photos.
I hope this helps.
Regards Zoran
JB THEVENON
Posts: 40
Joined: Tue Jan 19, 2021 5:11 pm
Location: Montigny-le-Bretonneux / Yvelines / France
Motorcycle: 1982 GL1100A Aspencade

Re: Still leaking fuel from carb

Post by JB THEVENON »

Hi,
I did a carb rebuilt on my SC02 GL1100 aspencade and had to remove several time the carb assy although I used OEM parts and US cleaning (my fault). But the last leak I had at carb 3 was due to the fuel hose. It looked great but it was the root cause. You need to eliminate causes one by one. First and cheap one could be to change the fuel hose.
JB
my philosophy : To do is to be (Kant). To be is to do (Sartre), Do be do be do (Sinatra)
mdblackjazz
Posts: 45
Joined: Thu Jul 15, 2021 9:56 am
Location: United States
Motorcycle: 1983 gl1100 interstate

Re: Still leaking fuel from carb

Post by mdblackjazz »

Check for crack in float bowl . Use magnifier remove #3 bowl look for crack next to screw holes.
Been there , just got my carbs back from rebuild and bowl replacement.


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