The ECM on my RG may have gone bad. The bike was progressively getting worse and worse during a recent trip into Kentucky until it was running on one cylinder and seemed to be out of time.
My mechanic has checked a lot of stuff on the bike and can't find anything else out of order. Now he is turning his attention to the ECM.

 

Its been known to happen but not a common problem....i
On a mobil app and cant see what year you have?

 

It happened to my 2008. I had about 7k on it and luckily they replaced it right before my warranty went out. I was told that it is not unheard of but extremely rare.

 

it is a computer and they can "just fail"

--- and one cause can be arc welding on a vehicle with the ecm in place...

( some may remember this happened to a BMW on "Long Way 'Round")

Mike

 

2008 Road glide, my ECM was changed in 2010 under warranty

 

2008 Road Glide, mine changed in 2008 on a road trip under warranty in Seattle area.
Seems like there is a pattern here with 2008 models, hmmmmmmm......

One thing I noticed after change is that my speedometer is spot on. Bike was going slower than what speedometer was reading with original one. Guess the software that was flashed into the new blank ECM at the dealer was better.

 

Just buy a Thunder-Max tuner, it will replace the ECM.
Better unit anyway.

 

It happened to my 08 sg.

 

What were the symptoms when it went out?

 

It might just be corrosion on the ECM plug. Before you do anything expensive. Unplug the ECM spray both sides with contact cleaner and then use some di-electric grease before reassembling. For $10 this might fix your problems...