new muffs backfiring

Discussion in 'Engine, Fuel and Exhaust' started by Das Motorad, Apr 18, 2008.

  1. Das Motorad

    Das Motorad Member

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    Hey All, I put on some new mufflers at least new to me. And I am having a back fire issue on decell from time to time. I got these pipes off a bud who had no isues with them he has the same bike a stock 2000 RK other than the Air filter.
    it has been changed to a K&N set up and this was done years ago he also has the same AF

    Any help here
     
  2. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    Was the mufflers you took off stock or another brand and if they were you have it re-mapped/dyno'd after you put them on? Also are the baffles on these new muffs different than the ones you took off? From what I understand and read,some "pop" on decell will happen. But I'm sure somebody here will have a solid answer for you Das!!
     
  3. glider

    glider Veteran Member

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    It's all in the fuel map. Did he have a download?

    Lower restriction mufflers than stock will give you some backfires from time to time.
     
  4. Das Motorad

    Das Motorad Member

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    Not that I'm aware of I will have to ask him and get back to you.
    But incase he did what would be the normal HD Dealer charge to correct?
     
  5. glider

    glider Veteran Member

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  6. Das Motorad

    Das Motorad Member

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    Could you elaberate in the TFI
     
  7. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    Is your question for Das or the bud he got the muffs from?? Ima touch slow ya know!!!
     
  8. glider

    glider Veteran Member

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    For either one but mainly for his bud. If he had the download and Das didn't, that could be the problem.
     
  9. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    ok!! quick ? on this --- Say Das had V&H muffs w/ 2" baffs.with a re-map and the "new" muffs were Rush 1.5 or 1.75/ no re-map,would that cause a back fire?
     
  10. glider

    glider Veteran Member

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    Probably not but visa versa yes.(better flow)

    Usually any less restrictive muffler will cause some backfiring. I have a few in mine on occasion with stock mufflers but you don't really hear them .

    If you follow someone with mufflers like ovals, watch the right pipe at night and you'll see flames popping out on decell.