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backfireing carb

Discussion in 'Motorcycle Tech Talk' started by gardian34, Aug 10, 2004.

  1. gardian34

    gardian34 New Member

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    I have a 04 883 converted with a 42mm mikuni. Backfireing from carb at idle and takeoff. Runs perfect once moving. I had Harley jet carb. They put a #155 main, And a #22.5 pilot jet. THis confuses me. According to the mikuni book, Std is #160 main and #25 pilot. Book says its to lean so why they downsize? Do I need to rejet larger or adjust jet needle?
    gardian34, Aug 10, 2004
    #1
  3. hotroadking

    hotroadking Super Moderator Staff Member

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    Check for intake leaks first, if none then rejet and see if it fixes it, change only the pilot jet for now, the main has nothing going on when you start or just start rolling.
    hotroadking, Aug 10, 2004
    #2
  4. fatboyvtwin

    fatboyvtwin New Member

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    If the above does not solve the problem I would re-check the timing. Ride Safe, David.
    fatboyvtwin, Aug 10, 2004
    #3

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