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My 1983 GL1100 is running too rich on #3. The plug turns black with carbon soon after it has been cleaned. The other three plugs look good and all four seem to be within tolerance for sync and I made sure they were gaped to specs. The bike normally idles fairly smooth, and runs pretty smooth, but will start cutting out at full throttle. I really do not want to pull the carbs (again, 5th time) and was hoping somehow the #3 carb could be leaned out, without taking the carbs off the bike. If this has already been discussed, just point me to that page. My fear is that there is really no shortcut here. By the way, I believe the ignition to that plug is good. I had replaced the wires and boots. The last time I had the carbs off the bike, I did make sure the air pistons were moving smoothly and the needle was not nicked.



I would appreciate any help you folks can give me.
 

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Discussion Starter · #3 ·
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kevin - the bike has not been setting idle for a couple of years now. However, it did at one time. I have removed and rebuilt the carbs, cleaned them thoroughly, as they were quite dirty when I got the bike a little over 2 years ago. I had checked the compression last year and it seemed OK then, but I will check it again. I have never messed with the idle screws, assumming they would have nothing to do with higher engine speeds. Am I wrong here? I could readjust the mixture, if you think that might help. I have never seen if the plug gets dirty at just idle, but I can also check that out, as well. I will let you know what I find out and we can take it from there.



Thanks for your advice on this one.
 

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Thanks chris in va... I think mine is in the same situation. Guess I will have to pull those carbs...UGH :(
 

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Great idea...I will try that one, before taking the carbs out. THANK YOU. :)
 
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