Performance-80 cubic evo

Discussion in 'FXR Models' started by Jonk777, Jun 2, 2014.

  1. Jonk777

    Jonk777 Member

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    On the performance side, getting more air in the motor thru the air breather, is a plus or not.:small3d026:
     
  2. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    More air in is always better. But you have to get it out too. You also have to mix increased air with the proper amount of fuel for the motor to run right.
     
  3. Jack Klarich

    Jack Klarich Expert Member

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    Fatten up your jets in your carb, Evos are more forgiving than Twin Cams:s
     
  4. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    The air cleaner housing is very restrictive to air flow on evo bikes so a complete air cleaner including a new back plate is required however the original cover can be used
    Larger jets in the carb and a less restrictive exhaust system are also needed however carb jets may be ok as hd started dropping jet sizes in 92 to meet lower emission requirements

    Brian