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post #1 of 39 (permalink) Old 08-08-2014, 07:57 PM Thread Starter
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Swing arm bushings/engine mount problem ??

So I've been chasing a vibe (for a week now) that I get when applying the rear brake. It seems almost like an abs pulse but it mirrors the vibration of the engine perfectly. At first I thought it to be bad brake pads which I've replaced and the problem improved slightly but was still there. It's only noticeable when leaning right (turns) or when braking.

Tonight I did some troubleshooting and here's what I found:

Sped bike up to about 50 applied rear brake and felt it throughout the entire bike (floor boards, handlebars etc). Repeated test but this time pulled clutch, killed engine and applied brakes and no vibration. Repeated test with abs fuse pulled and got the vibe still.

This led me to check the swing arm area and I pulled the swing arm covers and I see what looks like rubber residue around the swing arm bolts which leads me to believe that I've got some bad bushings or motor mounts or something.

Additionally with the covers pulled when I rock the bike it appears that the right bolt moves slightly with the rocking but it's by no means loose.

I'm thinking that installing the new wheels/tires brought the issue to the forefront or maybe it's coincidence. Either way I'm also starting to believe this to be the root cause to the "wandering" I experience when the bike is running heavier with the Tourpak on.

I think I'm gonna look into the GLIDE PRO system. Realigning the engine/trans and rear swing arm. Am I way off base here or ????


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post #2 of 39 (permalink) Old 08-08-2014, 08:06 PM
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I don't think so , I think you are on track

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post #3 of 39 (permalink) Old 08-08-2014, 08:12 PM Thread Starter
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I don't think so , I think you are on track



JtB

Ok good. I just found it strange how all the recent changes (wheels/tires, mono tubes, rear shock adjustments) brought the issue to the forefront. Was starting to regret my purchases.


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post #4 of 39 (permalink) Old 08-08-2014, 08:26 PM
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Ok good. I just found it strange how all the recent changes (wheels/tires, mono tubes, rear shock adjustments) brought the issue to the forefront. Was starting to regret my purchases.


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The vibration was probably there before but with the shitty stock suspension it just wasn't as noticeable. The weaker suspension more than like absorbed most of the vibration.

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post #5 of 39 (permalink) Old 08-08-2014, 08:47 PM
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I went with the GlidePro on the Skunk. The bushings are much nicer than the stock. Not sure how many miles you have or your riding style but the HD bushings are not that firm.

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post #6 of 39 (permalink) Old 08-08-2014, 08:52 PM Thread Starter
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I went with the GlidePro on the Skunk. The bushings are much nicer than the stock. Not sure how many miles you have or your riding style but the HD bushings are not that firm.

31k and I'm a bit aggressive in my riding style. How bad was the install? How was it time wise to install? Special tools?


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post #7 of 39 (permalink) Old 08-08-2014, 09:41 PM
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Let me know how it goes.....Mine's not a vibe but getting a weird wiggle since installing the mono-tubes....Have adjusted the rear several times.....just can't get it settled.......


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post #8 of 39 (permalink) Old 08-09-2014, 10:22 AM
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It is very unlikely that the swingarm bushing or motor mount is bad on your 2012. HD motor mounts are made out of much better material now than the earlier motor mounts were. The swingarm bushing is pretty stout and the only time I have heard of the bushing going bad is on the bikes that pull trailers.
I would think the rear rotor may have a little warpage in it to cause a vibration or pulse.
The front rotors are notorious for warping, the rear rotor is thicker than the front rotor is so it is less likely to warp but it can happen.
Making sure the alignment is good is important but I would find it hard to believe that it will cause vibration or pulsing in the brake system.
Also a check of the wheel bearings should be done, the rear has 3 wheel bearing with 1 of the bearings in the rear drive pulley so don't overlook the pulley bearing. My rear pulley bearing went out around 40,000 miles.
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post #9 of 39 (permalink) Old 08-09-2014, 03:49 PM Thread Starter
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It is very unlikely that the swingarm bushing or motor mount is bad on your 2012. HD motor mounts are made out of much better material now than the earlier motor mounts were. The swingarm bushing is pretty stout and the only time I have heard of the bushing going bad is on the bikes that pull trailers.

I would think the rear rotor may have a little warpage in it to cause a vibration or pulse.

The front rotors are notorious for warping, the rear rotor is thicker than the front rotor is so it is less likely to warp but it can happen.

Making sure the alignment is good is important but I would find it hard to believe that it will cause vibration or pulsing in the brake system.

Also a check of the wheel bearings should be done, the rear has 3 wheel bearing with 1 of the bearings in the rear drive pulley so don't overlook the pulley bearing. My rear pulley bearing went out around 40,000 miles.

Slowing from 50 with engine off/clutch lever pulled the bike slows perfect without any vibration so I'm not sold on bad bearings or a warped rear rotor. I'm gonna find the alignment thread and go that route.



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post #10 of 39 (permalink) Old 08-09-2014, 03:53 PM Thread Starter
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Let me know how it goes.....Mine's not a vibe but getting a weird wiggle since installing the mono-tubes....Have adjusted the rear several times.....just can't get it settled.......

I had the wiggle/wander issue at first after I swapped wheels but the mono tubes brought out the vibe for me. I think that the better suspension components don't do as good a job to mask things as well as the stock squishy shocks did. I'll let you know what I find. It's almost got me to the point where I don't even want to ride it the way it is.


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