2011 R1200GS Rough Idle

Discussion in 'GS Boxers' started by freyke, Aug 22, 2012.

  1. freyke

    freyke Been here awhile

    Joined:
    Nov 8, 2010
    Oddometer:
    338
    Location:
    Virginia Beach
    My 2011 R1200GS with almost 15,000 miles on has suddenly started to idle roughly when warm. Still runs great when rolling on the throttle. Also idles like a champ when first starting up. Had the 12,000 mile service done at the dealer about a month and a half ago. No faults or check engine lights on the dash. Problem didn't start to surface until about a week ago.

    Any thoughts.
    #1
  2. stickman1432

    stickman1432 Crusty Adventurer

    Joined:
    Jul 24, 2008
    Oddometer:
    767
    Location:
    So.Cal.& St George UT-Baja-riding anywhere
    Try a throttle sync should fix the problem..............either twin max or a Harminozer.........:wink:
    #2
  3. erkmania

    erkmania Still Adventuring

    Joined:
    Mar 19, 2004
    Oddometer:
    996
    Location:
    San Diego, CA
    You might try removing the small hose going to the left throttle body and capping the hose fitting off. There might be some fuel leaking from the carbon canister into that cylinder. Overfilling the tank may cause this.

    This is just to help you diagnose the problem. The carbon canister valve is not usually open at idle.
    #3
  4. freyke

    freyke Been here awhile

    Joined:
    Nov 8, 2010
    Oddometer:
    338
    Location:
    Virginia Beach
    Rough idle issue is fixed (under warranty) thanks to the folks at Adventure BMW in Chesapeake, VA.

    Guided diagnostics found the Secondary Air Solenoid to be inoperative. Apparently this was caused by a bad Fuel Tank Breather Valve (PN 13901433603) which was replaced along with a new Activated Charcoal Filter (Part Number: 16131464924).

    All good now; smooth as glass at idle.
    #4
  5. Chat Lunatique

    Chat Lunatique ACK

    Joined:
    May 9, 2011
    Oddometer:
    1,082
    Location:
    Niagara, Canada
    I don't think so. On a 2011 GS at idle, the throttle bodies should not be affected by the cables, which a throttle sync with the Twin Max sets. They are sitting on the throttle body stops. The only way to calibrate the stops is with a GS-911 or at the dealer.
    #5
  6. smokeeater495

    smokeeater495 Been here awhile

    Joined:
    Oct 14, 2008
    Oddometer:
    605
    Location:
    N.E. Indiana
    I overfilled my 2011 R1200GS this morning. I watched about half an ounce of fuel go down the overflow around the tank bung. Pulled out of the station and directly onto the interstate. Had a momentary bog while accelerating, lasted 5 or 10 seconds. It felt like the engine went way too rich. Ran fine the rest of the trip. Is the key just to not overfill or is there a fix?
    #6