So you've got yourself one of those "Smooth & Powerfull" rubber mount Harley Davidson Dressers. You can ride across town or across the country in blissfull vibration free comfort. Nothing can spoil the feeling you get cruising down that long lonesome hiway, except that uneasy feeling you get passing a big truck, or pouring on the throttle in a sweeping curve. You know...that unstable feeling of the ass end squirming all over the road, or the "wobble" that comes on when you push the speed limit a bit. The feeling thats makes you look for a Denney's to stop at when your packin' a full load and ridin' in a stiff crosswind.

That loose in the ass end feeling comes from the same technology that allows the smooth, no vibration ride. It's caused by the rubber mount system. Many Bagger Pilots don't realize that the swingarrn on the large HDs is not mounted solidly to the frame, instead it is connected to the transmission with a pivot shaft that is held in the frame with rubber grommet type mounts. These rubber mounts isolate the engine from the frame reducing vibration, but they also allow for lateral movement in the swing arm. This movement becomes very evident during hard turns, high speeds, crosswinds, or passing that slow moving 18 wheeler. It can also show up in bikes with high horsepower engines or other rubbermount models such as the FXR and older bikes with high miliage.

This wobble and looseness can cause a great reduction in riding pleasure and even has been know to cause accidents.

The Honolulu Police Department was so plagued by this problem that they opted to replace their entire HD fleet with more expensive BMWs.
Read the article here

Now there is a way to easilly address this problem. The StableRight system restores that
"glued to the road "feeling. It is easilly installed, unobtrusive and positive.