I have a 2010 FXDC that has a vibration above 60 mph that will go away with just a very slight pull on clutch. Motor mount has been replaced with a new one and shimmed as well. The compensator appears to be in good shape. The vibration seems to come on after it has heated up.

 

Pull in the clutch and disconnect the driveline from the rolling chassis and the vibrations go away? Engine isolators are my first guess; they are a wear item, and it's now '17.

Do yourself a real favor, and install a Predator front engine mount. Order from the U.K. site...

http://www.predatorvcs.com/harley_da...t_engine_mount

 

I replaced and shimmed the front isolator, that took care of one
the problem but this one has just started

 

How many miles? If it goes away with the clutch pulled in then it's most likely something in the drivline.

 

If the vibration has come on after the bike warms up, most likely it is timing/AFR.

Those two things are adjusted by the ECM as the bike warms up.

The other is oil viscosity. Oil gets thinner when it's heated up... cooler/thicker oil will keep a noisy engine quieter. Did you switch to a synthetic lately?... they are inherently thinner to start with, but don't thin out as much when hot... but they will make your engine a bit noisier.