Rough Running

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  • wdavie
    • Feb 2026

    #1

    Rough Running

    Hi all have put custom pipes on my 850 and now it's running a bit rough, coughing spluttering etc. Thinking I need to re jet for the pipes but how many sized do I go up and which jets do I change? Thanks Wayne
  • smokienutz

    #2
    tell them what pipes u are using and if your carbs are stock. makes a difference where to start. example: 4 into 1 v and h w/ stock carbs or 4 into 2 into 1 w/ i am not sure po did something to my carbs.. hope that helps.

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    • wdavie

      #3
      Hi good point it's running original downpipes fashioned into 4-2 with slash silencers, original carbs. Thanks

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      • tkent02
        Forum LongTimer
        Past Site Supporter
        • Jan 2006
        • 35571
        • Near South Park

        #4
        Up the main jets a couple sizes for starters, maybe lower the jet needle a notch. Should be somewhere near a good starting point.
        http://img.photobucket.com/albums/v5...tatesMap-1.jpg

        Life is too short to ride an L.

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