After noticing some strange sounds and feels from my 2009 FLTRSE3 drive train beginning at approximately 11000 miles, I started doing some checking. I was feeling what felt like slack in my drive train almost like a loose sprocket or drive belt. When running at a steady speed and then letting off the throttle, there was sometimes a clunk sound/feel in the bike, and again when I would get on the throttle from coasting.
I was going to check the primary chain automatic tensioner even though it did not sound like the chain slap from a loose primary, then after some searching online, I found Service Bulletin M-1256:
http://www.box.net/index.php?rm=box_download_shared_file&file_id=f_315011026&shared_name=gy9vp8hdgqI did some research and took my bike into the dealer today to have it checked. The dealer had not heard of this service bulletin, but checked my bike. The result is that my rear wheel compensator isolator is worn out at 11,600 miles, and will be replaced under warranty.
If you are noticing strange sounds or feel in your drive train, you may want to have this checked.