I know I've seen this subject talked about on this forum, but I can't find the thread after searching on idle, IAC, idle air control, etc.
This past weekend, my 2002 Futura would not return to idle at 0 throttle. Coming to a stop, pulling in the clutch, the idle would stay at 1600 rpm. The first couple of times it happened, I would rev the bike a little and it would drop. Then that quit working. What "fixed" it was shifting into neutral. The engine returned to normal idle.
The throttle grip isn't sticking. The bike has been running and starting great since changing to Rick's regulator and updating the wiring with solder and new plugs. Battery if fully charged, and the charging voltage at idle is consistent with others who have performed these mods. The bike has 6600 miles.
Is there a connection between the neutral switch and idle control? I remember reading something similar happening to another forum member in the thread I couldn't find - shift into neutral and the idle would drop to normal.