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My 08 Roadglide has it but nothing like it is currently. Ive put 35K on the bike and added a swingarm stabilizer just after purchase. So its always been there, but lately its amplified. My thinking is that since I pull a BT trailer behind the bike (started last year) that the added weight and flex placed on the swingarm bushings has accelerated the wear of them, which is giving more play in the swingarm. My 01 Roadking had an instance where it too was amplified and it turned out to be a bad front engine mount. Ive checked the front engine mount on the roadie, but it looks okay. I know there is a replacement swingarm bushing that is suppose to correct the problem, but for sometime everyone seemed to have a 'fix' for the wobble. Anyone have any suggestions or experience?

Three items come to mind:
Steering head bearings
Swingarm bushings
Front engine mount
 

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I pulled a trailer with a 1999 FLHT for 133,000 miles. No problems caused by it. I now pull it with a 2002 RG, no problems. I really don't thing the trailer is causing your problem unless it's super heavy. I know too many guys that pull them without problems.

I'd add tire problems to your list to check. I've never messed with an 08 or up but I'm assuming it still has the rubber donuts (bushings) on each side of the swingarm and internal bearings in the swingarm. I've heard of instances where the swingarm bearings were a loose fit and caused some wobble problems.

You really have to examine a front engine mount off the bike to determine what kind of shape it's in.

The HD method of checking steering head bearings is terrible in my opinion. I've spent over 50 years adjusting fork stem bearings the same way and have never had a problem yet. Front wheel off the ground and bike sitting level, loosen lower triple tree pinch bolts, tighten the bearings until you can feel the front end dragging a bit, then back off a little so the front end turns freely and there is no up and down movement in the fork neck. Tighten everything back up, pinch bolts 1st. Very similiar to doing wheel bearing on cars or trailers.
 

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It may be your swing arm bearings, check the engine stabilizers and the vehicle alignment too . What kind of stabilizer do you have? I use the Progressive Touring Link.
 

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Hey Kevin, just saw this and my 08 had it until just before shark week. Wife took it in for 5k check and told dealer about it. They checked everything but all I could tell that they did was tighten the fork bearings. Whatever they did it did not wobble for the 1100 miles I rode to Gettysburg and back. I only have 6k on it though and don't have the stabilizer. The wobble felt like it was in the rear cause the handle bars did not shake. Kinda unnerving at 75 mph going down a curvy interstate. So good so far, time will tell I guess.
 
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