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Discussion Starter · #1 ·
Good morning i have a question about my carbs
i have an 87 gsxr1100 with 88 mikuni carbs on it with 160 main jets and a yosh pipe

now my problem
i am having a problem with the #1 cyl burning rich ( plug is black )
the rest are burning pretty clean some # 4 is kind of white but 2 and 3 are good
the carbs are in sink and clean
were would i look or what should i do

thanks
chris
 

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Assuming all of the needles are set the same, et cetera I'd suggest checking float height and having a look at the needle 'n seat assembly on the "wet" cylinder.

Ed

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Discussion Starter · #4 ·
checked all the needles and float hight and it is all in speck

the plug isnt wet it is sooty black it gathers so much soot it quits sparking i clean the plug off and it will run for a little at normal speeds and then it is back to not sparking again

any other ideas

thanks
 

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I pull all of the plugs and compare the spark on all of them. The coil might be getting weak and not give you a good spark on that cylinder. When you have all the plugs out, I would do a compression check too.
 
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