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Posted on Aug 04, 2010
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Black bits in carburetter - 1970 Honda CB 100

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David Belcher

David Belcher

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  • Posted on Aug 04, 2010
David Belcher
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Either dirt in the tank is getting into the carb or the fuel line is deteriorating and pieces of the inside of the line are getting in the bowl. Disassemble the petcock and replace o-ring, screen, and four hole washer. Put on a new fuel line and consider adding a small inline filter typically used on a lawn mower. This should even take care of rust that may have formed in the tank over the years. If you have bad rust in your fuel tank a chemical cleaning kit can be purchased to soak the inside of the tank and clean out the problem.

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