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Discussion Starter #1
Hello! Finally got my new-to-me 79 GL1000 started. (Thanks to many of your comments...)
Now I ran into another (much smaller) issue. With petcock in OFF position, bike starts and idles fine. but when in the ON position it stumbles and cuts out after about 5 seconds.
BUT also in the ON position it overflows the carbs. WTH????
There is gas in the oil now. At least it smells like it. This is new oil after I drained the old crap out...which did NOT smell like gas. So I will change it again and see what happens.
What could be causing this? Almost like petcock is in reverse.
 

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Either way, your float valve is supposed to stop fuel entry once bowl is full, my guess is carbs need to come off.

You can eliminate petcock doubt by feeding gas through aux tank, that should clear things.


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1987 GL1200 Interstate
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I think those petcocks are still available new. If not the o-rings surely are.

I agree, the carbs will probably have to have some work.
 

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It's not the fault of the petcock, the carbs are flooding.
 

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If your sure it's the petcock that's the issue, they are available and it comes with O rings. Part# 16950-371-025.

But most likely, Dave's right.
 

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Blaming the petcock for the carbs flooding is like blaming your main water shut off for your bathtub overflowing.
 
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