CB1100 Idle speed instability problem

[Lord Popgun]

The interesting thing about all this is that is doesn't seem like one thing is causing the problem. Some have changed the IACV and cured theirs. One (at least) had the whole throttle body changed and that did it. And some in Europe have had the ECU reflashed with a fix and that seems to have done it. Yet in the US they say, as posted above, that they don't know anything about that. I believe that no one has replaced the ECU. That is a big cost for just a guess, although the manual does suggest that

The EOT sensor apparently plays into it, and I think one guy changed his but it didn't fix the idle problem. An interesting and aggravating problem that may have more than one cause. I wish I knew.