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Discussion Starter · #1 ·
Hi Guys,



I'm working on a friends cb750 and the center two plugs were fouled so I replaced them and bench synced the carbs (keihin). Mix screws are 2.5 out and it runs fantastic. Now, it just fouled out an outer plug and it's covered with black soot/carbon. I'm quite sure this means it's running rich. Should I screw it in a half turn or so? Thanks for the help in advance!
 
G

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Hi Guys,



I'm working on a friends cb750 and the center two plugs were fouled so I replaced them and bench synced the carbs (keihin). Mix screws are 2.5 out and it runs fantastic. Now, it just fouled out an outer plug and it's covered with black soot/carbon. I'm quite sure this means it's running rich. Should I screw it in a half turn or so? Thanks for the help in advance!






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