Normal or not normal for the 800GS

Discussion in 'Parallel Universe' started by IL adv, Jan 20, 2013.

  1. sorebutt

    sorebutt Long timer

    Joined:
    Jun 26, 2008
    Oddometer:
    2,329
    Location:
    Lewiston,ID
    My 2011 has never done it. Is there something wrong with it. Maybe I should take it to the dealer and complain it doesn't backfire.:evil
    #21
  2. FT-WA-MD-GS

    FT-WA-MD-GS n00b

    Joined:
    Nov 25, 2011
    Oddometer:
    9
    Location:
    Maryland, USA
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5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]-->FWIW, another vote for the Booster Plug...
    #22
  3. RheinGold

    RheinGold Weniger aber besser.

    Joined:
    Sep 6, 2006
    Oddometer:
    37
    Location:
    Breukelyn
    My 2012 with nearly 12,000 miles does it too. I's due to the lean fuel air mixture but also because the header and muffler pipe are a slip fit (held in place only by a small spring) and I think some of the popping may be due to gasses coming out of the joint too.
    #23
  4. LJRAT

    LJRAT LJR Adventure Tours

    Joined:
    Apr 10, 2009
    Oddometer:
    62
    Location:
    Stites, ID
    I have a full exhaust balanced with a free flowing foam filter and the booster plug! NO POP!
    #24
  5. GoneAgain

    GoneAgain Huh?

    Joined:
    Jul 14, 2009
    Oddometer:
    1,820
    Location:
    Bendigonia, Vic.
    both of my 800's (09 and 12) did/do it....

    but not enough... i love it... wish it would do it more often! :evil :D


    .
    #25
  6. itsatdm

    itsatdm Long timer

    Joined:
    Jun 19, 2004
    Oddometer:
    5,368
    Location:
    Nor Ca.

    I don't think that is the case, I sealed mine with no change. I suspect it is caused by the secondary air injection required for emissions. Joel explained it here: http://www.advrider.com/forums/showthread.php?t=637370 Does the F658gs do it? They do not have the air injection valve. In fact I suspect it may be USA specific as it does not show up in the universal repair CD.


    Whether it is added oxygen caused by the air valve or just the normal lean idle of the ECU, it is the result of a lean mixture. It is normal.

    The Booster plugs can help, as that rich ens up the fuel mixture as designed and there is some residual effect going back to closed loop (map) as the oxygen sender signal to the ECU does not result in an immediate change. If it is bothersome, don't snap the throttle closed.

    It is there, but more easily heard with the aftermarket straight through mufflers. The ECU also adapts to the muffler change. Not as noisy as when first added.

    I notice that in California, where they are always changing gas formulas, that it is more pronounced in summer than winter. The booster plug seems more effective in winter also, so they are doing something that effects burning rates of fuel.
    #26