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carb backfire rev bog

  1. 1980 cb900c carb backfire

    Need help! I just recently purchased a cb900 custom that was running a tad bit rought when i got it so i went through the carbs and everything looked fine and clean. Now after putting them back on i am expieriencing carb backfires and it bogs out at about 4-5k rpms. I dont know whats wrong or...