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550 back firing

Discussion in 'XJ Technical Chat' started by loolagigi, May 26, 2009.

  1. loolagigi

    loolagigi Member

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    i have a 550 maxim atv. i origionally had just str8 headers on, and it backfired a little. then i put the factory exzaust on, and its worse now. when i open it up it pops bad. any suggestions?
     
    loolagigi, May 26, 2009
    #1
  2. loolagigi

    loolagigi Member

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    anyone?
     
    loolagigi, May 26, 2009
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  3. TheHound

    TheHound Active Member

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    Have you rejetted the carbs?
    You must be running pods.
    Do a plug chop and see if you're any were close at idle.
    The stock exhaust has changed your tuning.
     
    TheHound, May 27, 2009
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  4. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Popping in the exhaust can be one of several things. Are the valves set? Are the carbs clean? Are the float levels set? Have the carbs been sync'd, Are the plug wires in good shape and on the right plugs? Is the stock air box on the bike or Pods? Lets start with those questions and see what comes of it.

    MN
     
    MN-Maxims, May 27, 2009
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