In the past I have asked about an intermittent high speed idle on my 2006 M109R. None of the comments seemed to fit my situation and since the problem doesn't happen all the time, I have been able to live with it. Recently I noticed that when pull up to a red light and stop, place the transmission in neutral to keep tension off the clutch cable, the engine sometimes idles at about 1,500 RPM. If I rev the engine it will often slow down to the 1,000-1,000 idle speed. Also when in neutral and I pull in the clutch, the engine idle will drop to 1,000-1,100 RPM. Why does pulling in on the clutch slow the idle.
Yes, I understand that it's not good practice to wait at a red light in neutral, but I've been doing it for 53 years and probably won't change.