Also this vibration occurs when I let off the throttle. Not idle or acceleration

 

Yep, same thing my WG was doing before I replaced the isolator and shimmed it...

Crawl down in front of the bike with a flashlight and check the front isolator, see if the rubber is contacting the front engine mount bracket. When the isolator begins to fail it distorts and the rubber makes contact with the bracket and can give you some nasty decel shuddering. There's an HD technical service bulletin M-1324 out on the problem from May of '12, their fix was to cut the contacting rubber of the isolator away but to me it's only a temporary fix. Just like a rubber band you've stretched out it never returns to its original shape and size...

The service bulletin is posted in this thread: https://www.hdforums.com/forum/dyna-...-question.html

 

hmmm...I've got a 2014 fatbob and I'm amazed at how vibration less the bars are.I have replaced the stock risers for 6.5" pullbacks and put Kuriakin grips on it which may contribute tro its smoothness though.

 

I will have to check the motor mounts. 3300 miles, you wouldn't think there would be anything wrong, but stranger things have happened

 

Bought my FXD with 5500 miles and it had the problem. Its not a miles thing, its a Harley had a crappy design/low bid the part lol. Its a issue that is only compounded when someone does an oil change and just lest the oil run down the motor and soaks the mount in oil.