Rush Slip-ons backfire

Discussion in 'Engine, Fuel and Exhaust' started by DGliderider, Feb 18, 2009.

  1. DGliderider

    DGliderider New Member

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    I have an 06 Streetglide with stock motor, Rush 2.25 slipons, an Arlen Ness Big Sucker, and a Power Commander. I had my local HD dealer install and Dyno tune. Bike performs great but backfires pretty bad on decelleration.
    Should I go with a richer mixture or think about a different exhaust?
     
  2. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    If your HD service tech. did all the work & dyno'd it,there should not be any "pretty bad backfiring"!!!!!! Sounds to me your problem might be the service dept. not with your mod. choices !!! Before changing anything,make sure all the nuts and bolts are tight. What kind of report does the dyno show before & after??
     
  3. Bud White

    Bud White Well-Known Member Retired Moderators

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    Im with you if it was recently done back to the dealer it should go and let them retune.. post the dyno sheet if you can
     
  4. Flashback

    Flashback Active Member

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    problem is a Dyno is only as good as the guy running it and a lot of em aren't worth a well you get the idea....
     
  5. STEVE07

    STEVE07 Well-Known Member Staff Member Super Moderators

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    A backfire on decel is unburn't fuel ,they have richened you up too much
     
  6. tlyoungb

    tlyoungb Junior Member

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    Interesting. I thought it would have been from not enough fuel that would cause backfiring.
     
  7. gs34

    gs34 Junior Member

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    JMO but I think the 2.25" baffles are a little too wide open for your setup. You can buy different baffles for the Rush...you might consider something that will give you a little more backpressure. Possibly, even a different size on the right and left.
    Try these folks and ask them what they have to offer.
    Fuel Moto USA
     
    Last edited: Feb 19, 2009
  8. glider

    glider Veteran Member

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    I agree there, try a 1 1/2' in the left side and at the most a 2" in the right side, even better a 1 3/4" in the right side.
     
  9. Bubbyguitars

    Bubbyguitars Member

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    I had the same problem on my 01 Road King . I had 2.25 baffles in Python slip ons , Stage 1 Air Filter and Power commander , switched to 1.75 baffles and all the popping is gone .
     
  10. BTSOOM

    BTSOOM Account Removed

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    I have Rush with the 1.75; SERT tuned. No backfire. I did try the PC3 -- they have to bypass the 02 sensors -- LOTS OF POPPING.