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Attention, carb rebuilders.

I was adjusting the mixture screws on my 80 550 last night and everything was going fine until I got to cylinder number 4. The screw had no effect on idle, and in fact I could screw it all the way in and it ran OK. Sure enough that plug was black. So how is the gas getting in? Through the choke? I cleaned the carbs but did not separate them and replace those o-rings, so I figure it's close to being sync'd. Checked the fuel level in the bowl and it's right on, 5mm below the bowl gasket line.
 
Steve314159 said:
I cleaned the carbs but did not separate them and replace those o-rings, ...
Click to expand...
You may now join the ranks of those who have found out that taking shortcuts when cleaning and rebuilding the carbs turns out to be longcuts. :oops:

Sorry, but if you did not separate the carbs, you did not clean them properly. :-\\\

Now, about your idle mixture problem. Take the mixture adjustment screw out and compare it to one of the others. I'd almost bet that the tip is broken off and you can't turn the mixture down. If the tip is broken off, I would make sure that it's not stuck in a carb somewhere, causing other problems. :-k

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The screw is not broken.

I started this project before I found this site. I know better now. My fear of taking them apart was that I wouldn't get them in sync after. But that doesn't look that hard now.

That being said the bike is at least looking pretty good and it runs so I'm making progress. I'll post before and afters some day in the spring.
 
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