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This one has me scratching my head

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Old Sep 8, 2025 | 03:17 PM
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Default This one has me scratching my head

I recently installed new manifold gaskets and carb seal on my 1995 Dyna. Here’s a thread with the details if you’re interested.

https://www.hdforums.com/forum/general-harley-davidson-chat/1484507-cv-carb-air-fuel-mixture-adjustment.html

What’s got me puzzled is after I got it all back together I’ve been tweaking the air fuel mix. Started it up a few days ago, went for a 10 mile ride and the bike ran fine. As soon as I got in the drive way it was idling ok but when I leaned it over on the kick stand it died right there.
Went out today and put 15 miles on it to get it up to operating temp, got home to adjust the air fuel mix and it idled fine again until I leaned it on the kick stand. The second I leaned it over both times it died.
One other detail is while I’ve been riding I can smell raw gas when I get on the throttle. Nothing is leaking as far as I can see.

Any ideas?
 
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Old Sep 8, 2025 | 03:43 PM
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Check the carb float level and the needle and seat
 
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Old Sep 8, 2025 | 05:40 PM
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You probably got a piece of debris or fuel line in the inlet when you disconnected and reconnected the fuel line and it's getting in between the needle and seat. Remove the carburetor, the float bowl, the float and the needle, clean everything thoroughly with carb cleaner and blow out the passages with compressed air if you have it, and be sure when you put it back together that the fuel line is good and not crumbly.
 
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Old Sep 8, 2025 | 06:06 PM
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Originally Posted by Tommy C
You probably got a piece of debris or fuel line in the inlet when you disconnected and reconnected the fuel line and it's getting in between the needle and seat. Remove the carburetor, the float bowl, the float and the needle, clean everything thoroughly with carb cleaner and blow out the passages with compressed air if you have it, and be sure when you put it back together that the fuel line is good and not crumbly.
I’ll check it out, but the fuel line is fairly new at only about 1 1/2 years old.
 
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Old Sep 8, 2025 | 06:19 PM
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Float Height
 
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Old Sep 8, 2025 | 06:29 PM
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Your float bowl level is set too high. When you lean the bike over on the kickstand, the excess fuel spills over into the carb throat and floods it, killing the engine. The raw gas smell confirms it's running rich. Pull the carb and adjust the float level lower. That should fix both issues.
 
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Old Sep 8, 2025 | 06:34 PM
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Originally Posted by Roberto88
Your float bowl level is set too high. When you lean the bike over on the kickstand, the excess fuel spills over into the carb throat and floods it, killing the engine. The raw gas smell confirms it's running rich. Pull the carb and adjust the float level lower. That should fix both issues.
Makes sense. I imagine it got out of adjustment while I had the carb off replacing the fuel inlet. Had it on its side and upside down on my bench yanking the damn plastic inlet out.
 
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Old Sep 8, 2025 | 06:56 PM
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Originally Posted by Bubba Zanetti
Makes sense. I imagine it got out of adjustment while I had the carb off replacing the fuel inlet. Had it on its side and upside down on my bench yanking the damn plastic inlet out.
Without the float bowl being removed it would be highly unusual for the float adjustment to be changed, unless you were really whaling on that poor carburetor...

You may have gotten debris in the carburetor when the inlet was changed, however. Regardless, you have to remove it and check it.
 

Last edited by Tommy C; Sep 8, 2025 at 06:59 PM.
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Old Sep 8, 2025 | 07:13 PM
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TC has good advice, might as well check everything and see if all clean and in spec.

John
 
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Old Sep 9, 2025 | 05:13 AM
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Yea I’m just gonna pull it and open her up sometime in the next few days. I’m thinking I might as well change the jets back to stock while I’m in there.
 
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