I had the isolator changed at 18,000 and the bike runs smoother. The Indy shop tech who has a Super glide said Dyna’s have a tendency to go through&nbsp\\;isolators.
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Expy,for a $100 it's got to be worth a shot,im busting to do it,but the bikes in Tn.&amp\\; i'm in Liverpool.
Brit.&nbsp\\;&nbsp\\;

 

I got my bike back today.&nbsp\\; It's much better.&nbsp\\; It now has what I'd consider normal Dyna vibes at decel, but I can now run my bike at 65 in 6th gear without it rattling my teeth out of my head.
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Epxy - Do you get some vibes at decel with the fix?&nbsp\\; I do.&nbsp\\; But, again, I *think* that's normal.&nbsp\\; I'm just not sure because I've never had a Dyna (always had softails).

 

Daryl, I still get have some decel vibes before my bike gets warmed up. Once its warmed up it&nbsp\\;mostly goes away. I consider my vibes normal and like it. Before the fix it was uncomfortable and now it runs like a Dyna should.

 

Hey expy - thanks for this thread. My bike vibrates quite a bit in the lower RPMs but I never thought much of it (except it kind of bugged me that 5th gear was smoother than 6th). Hey, it's a Harley, right? Anyway, after seeing this thread and the new vs. old pictures, I went out and took a look at my front isolator. Turns out there was not a gap b/w the engine mounting point and frame mounting point as you described. Even at that point, I thought maybe it was fine, because I really didn't feel it vibrated that badly. But since this is the last season for my warranty, I figured what the hey, and took it into the dealer. I figured they would come back and give the "its a Harley", to which I would reply, "you're right - thanks for checking anyway". However, to my surprise, they said it was showing signs of tearing and should be replaced. Well shucks. So I've got a new isolator on order that they will be replacing on warranty. I'll be real interested to see the difference! Thanks again, man!!

 

Good to hear rok. I think this makes 4 of us that got it replaced under warranty. I'm still cruising smoothly with my replacement.

 

&nbsp\\; This has been an excellent thread. The kind of info that can only be shared on a forum. Thank you Expy. This sounds like it should be a recall part for HD. It just doesn't seem like anyone should have to pay for this regardless of being out of warranty. Anyone had a discussion along these lines with thier dealer?

 

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I agree with dynaglider on this one.&nbsp\\; There is only so much weight and shaking the rubber can take before it's done. Too bad there aren't any aftermarket poly urathane mounts out there. Maybe if we hound Energy Suspension enough they will start producing them.

 

Energy Suspension claims two advantages for urethane over rubber (1) better resistance to oil, road salt, ultraviolet, and dry rot and (2) and less deflection under greater loads.

These traits should increase the longevity and reliability of a motor mount. But I think you will find that urethane does a poorer job of isolating vibration which, after all, is the point of this thread.

The OEM motor mounts are an engineering trade-off: decent isolation of motor from frame with only so-so longevity.

So for people sensitive to vibration, the moral of the story is to replace your motor mounts as soon as they begin to deform. The first time or two, you will be able to do it under warranty. After that it is on your own dime. (Or trade for a new or different bike.)

 

Just wanted to post an update. Mine was replaced last week. I've put over 200 miles on it since then and the difference in the vibration is night and day.
Normal vibes in decel and at idle while warming up. Other than that I think the bike is running great. Thanks Expy!