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  • #21
    Re: wandering idle...my '07 R* midnight has a normal sounding idle after warmup, but after coming off the highway, the idle is a lot faster. The temptation to reduce the idle in those instances is almost unbearable. Normal or something wrong ?

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    • Spydr
      Spydr commented
      Editing a comment
      Mine does that also. Pretty sure it's normal.
      Even when I had the idle set low for a nice lope, it still would idle very high after a while at highway speed.

  • #22
    I might have missed it, but I didn't see anyone mentions the TPS as a possible source of an erratic idle. I bring this up because a few weeks ago my brother was complaining of a constantly changing idle speed that he had been dealing with for several years. He had checked everything he could think of until I suggested testing the TPS and get a reading on it. Wouldn't you know his TPS was sitting at 900...no big deal right? Resetting the TPS to between 650 and 700...it's kinda tricky to dial it into a specific number, but close is good and all of a sudden the idle stays exactly where you set it. He's dealt with this issue for years and was so frustrated that he's sworn he would sell the bike a dozen times over. Now that the idle is fixed it's like a new bike and he's one happy dude.

    Go through all the normal check list items when you've got an erratic idle, but do yourself a favor and check the resistance of your TPS to make sure it's within limits...you might be just as surprised as my brother.

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    • Flashback
      Flashback commented
      Editing a comment
      You make a good point, the tps is very affected by temp............

    • midnitmike
      midnitmike commented
      Editing a comment
      One of his biggest complaints was the variation in idle speed throughout the temperature range. Set the idle....get out on the freeway and when you pull off for fuel or a rest stop it's cranking at 2000 rpm. Reset the idle and the next time you pull up to a stop it dies. It NEVER stayed where he set it so he was constantly messing with it...now he just rides.

  • #23
    Has anyone tried the TPS check yet? it sounds plausible. Here's the how to article if anyone is interested:

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    • #24
      Are you sure that is the correct link for the TPS check Doc? It's not taking me to the article.

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      • #25
        TPS

        https://wayback.archive-it.org/10073...nt/view/64/96/

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        • #26
          Howdy gang, I am looking for a technician that is well versed in the Roadstar carb near Greenville SC. I have little faith in dealers as I had that particular dance before. I do not plan on hanging out and asking a bazillion questions. I only want to drop it off, return when fixed, pay money and drive away. Started with carb puke, went to stumble at which point I tried the re-jetting. Wandering idle blah blah blah. I haven't ridden it since my last post on 10/6/2018. Upstate SC tech please. I don't need counsel on repairing myself. Thank you.
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          • #27
            That is a sad story indeed. Hopefully someone knows someone!
            ​With enough beer you can do anything...D.Pate

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            • #28
              to bad MrShamrock isn't still around. He is very good with these things and in that area.

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