In Santiago, CHILE: '02 1150 GSA Idle Question

Discussion in 'GS Boxers' started by Aventeren, Feb 5, 2013.

  1. def

    def Ginger th wonder dog

    Joined:
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    From your description, it sounds like a worn throttle body. You won't really know if it is the shaft or the bushing until you remove it and take it apart.

    When the TB wears, it passes more air into the intake, almost like opening the throttle slightly, and the engine idle speed increases. As recommended, reduce the idle air by screwing the BBS screws in.

    Until you rebuild the TBs, you'll have difficulty achieving proper idle RPM.

    More photos please...:clap
    #21
  2. Jarvis

    Jarvis DC GSer Administrator

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    Roberto and Sonia are good people. I'm glad you got to meet them!
    #22
  3. kellymac530

    kellymac530 motorcycle addict

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    Aventeren,
    If your issue is a worn TB or TB shaft causing air leaking and rough idle because of random leaning I doubt that is anything catastrophic. It will idle funny and random and maybe even run rough a bit but as long as you do not let it sit and idle a long time {not reccomended anyway} it will not likely run hot from the lean.

    A simple but very temporary fix is to take some grease and pack it around the TBs anwhere there is an opening, like around where the shaft goes out the body to the linkage. The heavier the grease the better. The fix will attract dirt and cause its own issues like dirt and grime, but that can be cleaned off with some carb spray and new grease.

    The thick grease will sort of seal off the air passage sometimes and prevent the air from passing by the shaft. I have done this on old Weber and Kadron carbs for VW bugs. It may work even better on the FI bodies since there is no fuel in the TB until after the injector.

    Worth a quick try and see if it helps for now.
    #23
  4. legasea

    legasea Ape on wheels

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    Did you read this?
    #24
  5. Aventeren

    Aventeren Been here awhile

    Joined:
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    Did It: US to Ushuaia, Argentina
    Funny thing, I actually camped behind the Copec gas station (for free), and my bike was parked on this old washed out boardwalk, and I was thinking to myself, "Huh, that's weird. There must have been a major Pacific storm that came through here and wiped this damn boardwalk out." And then I went to sleep. I then woke up and had breakfast, and the place had WiFi, so I searched Wikipedia for Chaiten, and lo and behold the boardwalk had been wiped out from the damn river that cut the damn town in half for the damn volcano, which was the largest pyroclastic volcano since something like 1912. So I went exploring on my bike after breakfast, and was blown away by the devastation. It definitely put nature in perspective. I was floored.

    In any event, thanks for the tip! :clap

    #25
  6. Aventeren

    Aventeren Been here awhile

    Joined:
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    Did It: US to Ushuaia, Argentina
    I did, and I tried it, but I have bigger problems with this TB. Basically the pulley that receives the throttle body has a shaft on it that connects into the body of the TB. From what I can see, this shaft is beginning to wear, and so the whole shaft/pulley assembly is beginning to wobble like a born bearing. I'm one day out from Ushuaia, so I hope that I'll be okay--and I think I will. This bike is so damn resilient...just so long as this damn TB does not physically blow up, I'm going to finish my trip, get the bike back to the US and then tear into it.

    There is a time to tear into TBs and there is a time not to. As it turns out, I have decided that tearing into a TB in a foreign country to attempt a repair on a problem that is not a trip ender (yet) is not a wise use of time and energy. I'm therefore in finger crossing mode. As long as I'm making km, my predilection is to continue south...and then deal with this later.

    Thanks for thinking of me!!!!! I really appreciate it!!!!

    :beer

    #26
  7. LaurelPerryOnLand

    LaurelPerryOnLand Long timer

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    Well...glad to see that due to your observant nature and curiosity you were able to learn (firsthand) some of the history of Chaiten...rather than simply riding through the town like most of us would have done.

    Interesting that your 'reasonable' explanation would be: Pacific Storm, Sounds like a high probability answer!

    Who'd a thought that the better answer was "the largest pyroclastic volcano since 1912"...yikes.

    Note to self: Never camp near rivers in mountainous terrain.

    Another pic of Chaitan volcano erupting: if you see anything even close to this...get out of Dodge!
    http://mw2.google.com/mw-panoramio/photos/medium/16044322.jpg

    Ride on!
    #27
  8. legasea

    legasea Ape on wheels

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    As you are in control, all I wish is that you ride safe, enjoy and make it to the end.

    Cheers
    #28