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katana 1100 backfires

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  • katana 1100 backfires

    hello everyone,what causes your bike to backfire and rumble when u are gearing down,my bike just came back from the shop and they rebuilt the carbs ,adjusted the valves ,cleaned everything up,i myself put on new rubber gas lines ,(no kinks) and i checked the coils and wires and they are old but in speck with the manual... other than that the bike runs pretty good, but the bike feels a little rough when u rev it up ,not as smooth as earlier this year. Is this just a carb adjustment? any answers would be great.............

  • #2
    Did they synch the carbs? (I would HOPE so)
    Must read for carb tuners......http://www.factorypro.com/tech/tech_...m_engines.html

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    • #3
      dirty pilot circuit, miss-set a/f screws
      99% of the questions asked here can be answered by a 2 minute search in the service manual. Get a service manual, USE IT.
      1990 Suzuki GSX750F Katana
      '53 Ford F250 pickumuptruck
      Lookin for a new Enduro project

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      • #4
        ya the carbs were set,i'm thinking the air fuel screws need to be turned to 2.5 .. does anyone know on the 34 bts where they are.???? my bike is a 1988 1100f..are they underneath the carbs?

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