CB1100 Idle speed instability problem

[dave]

I am amazed that after over eleven years, and dozens of owners experiencing this exact same problem, that Honda hasn't figured out the root cause. I replaced my IACV eight years ago and never experienced the problem again. However, there are forum members who have replaced their IACV and this did not solve the problem for them. Some forum members report that ECU replacement is the only solution, and some forum members from Europe have reported that an ECU reflash cured the problem for them. Honda America will not reflash an ECU. The fact that Honda doesn't even acknowledge the problem doesn't speak well for them.
Cbman. Report back to us in a month and tell us if your idle issue has been permanently fixed. My bet is it isn't, but good luck.