Would a bigger exhaust on my bike cause it to run leaner or richer?

  • Thread starter Thread starter Blessy
  • Start date Start date
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Blessy

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I got a Micron exhaust for my CBR 125 to make it sound a bit better (kept the baffle in) and now it pops when I decelerate. Is this because my bike is running too lean or too rich? Do I need smaller or bigger jets if any?
 
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