Watched video. Jezuz. No way would I be riding that thing until it is fixed.
That said...you know, my Jeep does the same thing. I thought it was because I put the replacement steering stabilizer on wrong. So, I removed it, and installed a new one correctly. That DID solve my problem for a few months, but now it is back again.
So, I don't know what the problem is. It is scared though. Jeep doesn't do it until you are above 40mph or so. In Jeep circles, they call it the "death wobble" and it is closely associated with Jeeps that have been modified with increased suspension.
First off, wheel bearings should last a long, long, long time. So if you're replacing them, you've got problems. How many miles at the first replacement? You only mentioned that it was two years ago. I would think that if you got 75,000 miles on them, you got your moneys worth out of them. After that, you are on borrowed time.
Hey AG, ain't you go any nerve? That little shake bother you? My 400 Shook exactly like that and it NEVER bothered me, not even for a New York Minute! First things first, your not supposed to let go of the handlebars, much less drive around not holding them! Didn't you notice in that Video that when he was holding the handlebars that they NEVER SHOOK. I never tried mine without the top box like he did, for comparison. Yeah just keep good tires, balance them
And everybody knows that the Jeeps are famous for their problems with wheel and brakes. Didn't those abs senors give you a fit a while back. I wouldn't be worried about any wobble, I'b be worried about that Jeep! (That's why I drive only Toyota's now, No problems Mate!)
My brother used to be a Jeep man, now he's all Honda.
Wheels go round and round.