Dyna death wobble...
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Road Captain
Joined: Mar 2006
Posts: 579
Likes: 26
From: Virginia
Dyna death wobble...
Since I did the suspension on my '96 dyna, she's been very twitchy at highway speeds. A good bump just about sends the bars into a tank slapper. I think it has to do with running 13" shocks on the rear and the fact that the FXDS (dyna glide convertible) has a steeper head angle 28 vs 32 of the low rider. Any ideas? I was thinking about raked bearing cups? I read that just going with raked triple trees shorten the trail and will be it even more unstable. Or slap a dampener on it.
Road Master
Joined: Jan 2012
Posts: 856
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From: North Carolina
A buddy of mine lower and raked out a Yamaha Roadstar. It developed what he described as some pretty unsafe handling characteristics. He was told to lose the stock front wheel and install a 21 inch front wheel. He says that the handling issues cleared up. Not saying that will fix yours but, it's food for thought. My wife's sporty trike has a dampener on it and it helps a lot with wobbles and such.
Outstanding HDF Member
Joined: Jul 2013
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From: Houston, TX
Until you have to come back through the head shake.
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Road Captain
Joined: Mar 2006
Posts: 579
Likes: 26
From: Virginia
Well right now it's just a wobble that gets induced with a big bump. It settles out if I relax and put even pressure on both grips. But if I'm on the highway and just bump on the bars, it'll wag a few times, then steady out. I'm too scared to try and get it to really wobble. That's why I think it has to do with the 28 degree rake.
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Road Captain
Joined: Mar 2006
Posts: 579
Likes: 26
From: Virginia
JRI 13" rear shocks. Front has racetech 1.0 straight rate springs and gold valves. So the forks ride a lot higher than then did, but also the rear is jacked up. I think that contributes to the steering. On sport bikes, raising the rear or lowering the forks just 10mm makes the steering sharpen up considerably.
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Road Captain
Joined: Aug 2009
Posts: 691
Likes: 4
From: H-TOWN TEXAS
Wasn't there a difference in the fxd models that had a +2" fork tube?
If your not already there maybe the front can be raised 2" to compensate for the raised rear. That way you don't loose the ground clearence/cornering you were looking for with the 13" shocks.
If your not already there maybe the front can be raised 2" to compensate for the raised rear. That way you don't loose the ground clearence/cornering you were looking for with the 13" shocks.
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