Most of that info has to do with what is known as "rear steer". One main cause of it was worn composite bushings in the rear swing arm and other worn components in the rear suspension. The MOCO changed the components in later years.

Now that being said, my 06 Ultra would sometimes be a bit "snakey" in the curves and at slow speeds. As others mentioned, tightening the neck bearings eliminated the problem. Even when it would do that she was solid on the straights at speeds up to 110.

 

Had no wobble on my Road King up to 100 mph (did not go above).
Occasionally I now have a wobble on the Ultra and when I do I know the rear tire pressure is low. I put it where it should be and the bike tracks straight.
Also I run my rear shocks pretty stiff.
Not much you can do if the road is grooved or on tarmac junctions, but the bike is a heavy tourer with a rubber mounted motor and this needs to be factored in.
That said, I have seen some mighty motorway wobbles on my brother's Heritage Classic.

 

No wobble on my 2000 RK at speeds in excess of 100mph.
I do notice a little drifting though.


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No wobble here up to 95 mph.

 

No wobble on my 06 RKC at 90mph.

 

My 04 has never had a wobble of any kind in 20,000 miles.I have heard of it on HD touring bikes but have also heard other makes have had similiar probems

 

My 02 RK was rock solid, no wobble at all.

 

No wobble on 2005 FLHPI with tall windshield at 95.

 

06 Road King 10,000 Miles never had a wobble at any speeds.

 

my buddy has an 06 RK and it was fine till he put extra wide texan bars on it. It now wobbles bad at highway speeds. I think it's the bars, mirrors, and his arms catching the wind though and not the RK.

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