Another carb question


Information and questions on GL1200 Goldwings (1984-1987)
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Slick Willi
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Joined: Mon Jun 22, 2015 9:36 pm
Location: Jacksonville, Florida
Motorcycle: 1987 GL1200I Interstate

Another carb question

Postby Slick Willi » Sat Sep 05, 2015 1:44 pm



After cleaning the carbs on my 87 1200interstate, I now have gas leaking from the upper crossover tube between #2 & #4 carbs. I have removed them again, and can find no debris in the needle valve ports. Can someone please tell me if something other than floats can cause this? :cry:


Slick Willi 8-)

rzaugg
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Location: Cedar Rapids, Ia
Motorcycle: 1984 GL1200 Aspencade
1989 GL1500 Aspencade

Re: Another carb question

Postby rzaugg » Sat Sep 05, 2015 4:45 pm

Assuming that it only leaks when running, are you sure that it is coming out of the vent tube. I have several times had to replace O-rings on the fuel supply tube between the carbs. Is kind of difficult to see when running, but it is pressurized fuel in that tube and is the most common spot to leak.

Good Luck

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Slick Willi
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Location: Jacksonville, Florida
Motorcycle: 1987 GL1200I Interstate

Re: Another carb question

Postby Slick Willi » Sun Sep 06, 2015 4:14 pm

rzaugg wrote:Assuming that it only leaks when running, are you sure that it is coming out of the vent tube. I have several times had to replace O-rings on the fuel supply tube between the carbs. Is kind of difficult to see when running, but it is pressurized fuel in that tube and is the most common spot to leak.

Good Luck

I made very sure of where the gas was coming from. It is definitely coming from the open nipple on the black plastic crossover tube between the carbs. It certainly acts like the carbs are flooding. However, after removing carbs again, I could find no debris in float ports.? :evil:
Slick Willi 8-)

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rjlv25
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1987 GL1200I Interstate
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Re: Another carb question

Postby rjlv25 » Sun Sep 06, 2015 6:37 pm

Did you replace the needle and seat? Check the float height? When I tore mine apart, there was a groove worn in the needle valve.

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Slick Willi
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Location: Jacksonville, Florida
Motorcycle: 1987 GL1200I Interstate

Re: Another carb question

Postby Slick Willi » Mon Sep 07, 2015 9:48 pm

rjlv25 wrote:Did you replace the needle and seat? Check the float height? When I tore mine apart, there was a groove worn in the needle valve.

No problems with the needle valves or ports. I haven't replaced the hoses yet, so I'll do that next. I sure hope new hoses solves my problem, I'm tired of pulling these damn things!!! :cry: Thanks for your thoughts though.
Slick Willi 8-)

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julimike54
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Location: Euless, Texas
Motorcycle: 1986 GL1200A original owner
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Re: Another carb question

Postby julimike54 » Tue Sep 08, 2015 8:17 pm

When you think you're done, benchtest them for leaking with an elevated (5 ft) gas can above the carbs. You can verify before install. I'm presuming yours are leaking like mine was, the float seats where tarnished & grooved, they just let the fuel out. Is you leak on the left side?
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Slick Willi
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Joined: Mon Jun 22, 2015 9:36 pm
Location: Jacksonville, Florida
Motorcycle: 1987 GL1200I Interstate

Re: Another carb question

Postby Slick Willi » Tue Sep 08, 2015 8:57 pm

julimike54 wrote:When you think you're done, benchtest them for leaking with an elevated (5 ft) gas can above the carbs. You can verify before install. I'm presuming yours are leaking like mine was, the float seats where tarnished & grooved, they just let the fuel out. Is you leak on the left side?

Thank you for that, julimike54, that is a good idea!!!! I will do that. And yes, they are leaking on the left side, between #2 & #4. I have gone back through them again,in order to check the condition of the needles, ports, and floats. I could find nothing that looked suspect.
Slick Willi 8-)

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julimike54
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Location: Euless, Texas
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2016 HD FLTRU

Re: Another carb question

Postby julimike54 » Wed Sep 09, 2015 8:06 am

The last rebuild (I didn't do it, but a great mechanic did) stated use only Honda components for needle & seats for floats, all others suspect.


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Riding anything is a good day!
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