Fuel leak - idle screw connection?


Information and questions on GL1000 Goldwings (1975-1979)
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ChuckSeders
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Joined: Wed Jul 14, 2021 9:25 pm
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Motorcycle: 1975 GL1000

Fuel leak - idle screw connection?

Post by ChuckSeders »



Noticed a leak while riding today. Can't tell if it's coming from some connection near the idle screw or from in between the plenum halves or what.

I just did a carb overhaul with the randakks kit which included a new gasket for the plenums.

Any experience with a leak at this spot?
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Overdog
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Re: Fuel leak - idle screw connection?

Post by Overdog »

I can't tell from the picture...is it dripping off of carb#3? The potential leak source there is the accelerator pump. If the diaphragm goes bad gas will travel up the rod and squirt out the top. You can usually see it if you look at the pump rod and twist the grip sharply.
MattMcCoy
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Re: Fuel leak - idle screw connection?

Post by MattMcCoy »

Overdog wrote: Sun Oct 03, 2021 7:27 am I can't tell from the picture...is it dripping off of carb#3? The potential leak source there is the accelerator pump. If the diaphragm goes bad gas will travel up the rod and squirt out the top. You can usually see it if you look at the pump rod and twist the grip sharply.
I might be wrong, but I don’t think 1000 carbs have an accelerator pump.

An inexpensive UV flashlight is really helpful in chasing down leaks.
ChuckSeders
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Re: Fuel leak - idle screw connection?

Post by ChuckSeders »

I can't tell if it's from the #3 carb or from another location like the plenum. I've read the floats can get stuck but haven't opened it up to check. I don't believe this bike has an accelerator pump either, but I'll get a UV light and see if that helps locate the leak.

Thanks for the tips!
cfairweather
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Re: Fuel leak - idle screw connection?

Post by cfairweather »

You have a set of 1975 GL1000 755A carbs and they don't have accelerator pumps. The two likely sources of the leak are the float valves or the plenum fuel seals.
ChuckSeders
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Re: Fuel leak - idle screw connection?

Post by ChuckSeders »

One of these days I promise to get back to this and check it out! For now I'm battling a 2000 Road Star that won't idle. Thanks for the ideas to consider!
ChuckSeders
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Re: Fuel leak - idle screw connection?

Post by ChuckSeders »

Finally got back to see what I could see. In the attached image, the surface that I'm pointing to gets soaked with fuel. I don't know exactly where it's coming from but I think I may be dealing with a bad plenum gasket.

Are there other things that may be the cause here? I'm sure it's leaking towards the front as well I just can't see it. Would be happy to send any of you a video via text if that might help.

I appreciate your insight on this. (also, the road star is still being a jerk)
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AZgl1800
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Re: Fuel leak - idle screw connection?

Post by AZgl1800 »

My insight into unseen images is on the Fritz tonight, you forgot to attach the pix
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ChuckSeders
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Re: Fuel leak - idle screw connection?

Post by ChuckSeders »

Ugh! I watched it load up but apparently I didn't watch close enough... Trying again.
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