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Discussion Starter #1
I have the amotostuff adjustable top rack and it vibrates like a freakin sex toy during mid to high throttle, say around 4k and up. So of course the top box then vibrates just as bad. The sound is annoying and makes the bike sound like a piece of junk. I've taken the top box off and removed the top half of the rack and inspected everything. I can not figure out what the heck is vibrating!!! :evil:

Anyone else have this problem? I don't know if the rack is the problem or if I should be looking at something else.
 

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HI Dennis< i can sympathize with you as my givi crash bars hit a high note at 5200-5900 RPM. It drove me nuts. I loctited them and its better although there is still a slight vibration. Try some tight bungees over the box and see if it makes a difference. If it doesnt help then you can start looking at the latches or something else altogether. good luck JonnyReb
 

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Discussion Starter #3
HI Dennis< i can sympathize with you as my givi crash bars hit a high note at 5200-5900 RPM. It drove me nuts. I loctited them and its better although there is still a slight vibration. Try some tight bungees over the box and see if it makes a difference. If it doesnt help then you can start looking at the latches or something else altogether. good luck JonnyReb
Thanks.
The thing is, even with the box off, i can hear the rack vibrating. So i'm trying to stop it at the source. Even if i make sure the givi doesn't vibrate, the rack itself is still making noise.
 

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There are some captured lock nuts in the adjustable top plate that are for a different kind of top box (IE you don't need them). Remove the plate and put it on the bench, place a socket under the nut and drive it out with a punch. Re-install plate, no more vibration.
 

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Discussion Starter #5
There are some captured lock nuts in the adjustable top plate that are for a different kind of top box (IE you don't need them). Remove the plate and put it on the bench, place a socket under the nut and drive it out with a punch. Re-install plate, no more vibration.
Thanks, I'm gonna try this. I wondered if those things were the culprit.
I'll report back...
 

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Discussion Starter #6
Well, so far no luck with those nuts. Those things are REALLY welded in there! They don't seem to move at all so I'm not so sure they are contributing to the vibration. But check this out... I had the box off, bike on centerstand, in neutral, I was standing on the right side of the bike goosing the throttle. I looked at the rack and every time i got the throttle to around 5k or so, the top plate on the rack actually BOWED! It flexed becoming higher in the middle! That's how much vibration there is back there. Is the rack the problem, or is the rack vibrating as an end result of something else that's vibrating? That's what I'm trying to figure out. And because of the brake light wiring from my Givi box, I can't remove the rack without removing the wiring which is a major PITA.
But if the rack is vibrating that bad, of course the Givi and all it's plastic reflectors and other panels are vibrating like mad, i'm sure. :mad:
 

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Well, so far no luck with those nuts. Those things are REALLY welded in there! They don't seem to move at all so I'm not so sure they are contributing to the vibration. But check this out... I had the box off, bike on centerstand, in neutral, I was standing on the right side of the bike goosing the throttle. I looked at the rack and every time i got the throttle to around 5k or so, the top plate on the rack actually BOWED! It flexed becoming higher in the middle! That's how much vibration there is back there. Is the rack the problem, or is the rack vibrating as an end result of something else that's vibrating? That's what I'm trying to figure out. And because of the brake light wiring from my Givi box, I can't remove the rack without removing the wiring which is a major PITA.
But if the rack is vibrating that bad, of course the Givi and all it's plastic reflectors and other panels are vibrating like mad, i'm sure. :mad:
I've seen the exactly same thing. I've found that keeping the attachment nuts tight cuts down on the buzz, but doesn't eliminate it. I gotta figure there's a resonating frequency thing going on here, so removing nuts/mass in the right place should move the moment of resonance, hopefully to around 12K RPM, which you'll never hit.

I can dream, can't I? It drives me nuts the most because the Amotostuff rack setup is so damn nice otherwise.
 
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I have the amotostuff adjustable top rack and it vibrates like a freakin sex toy during mid to high throttle, say around 4k and up. So of course the top box then vibrates just as bad. The sound is annoying and makes the bike sound like a piece of junk. I've taken the top box off and removed the top half of the rack and inspected everything. I can not figure out what the heck is vibrating!!! :evil:

Anyone else have this problem? I don't know if the rack is the problem or if I should be looking at something else.
I found what was making the buzzing noise. There are four of these captured threaded inserts in the top plate that just buzz in their respective holes. There are no bolts in them so they are free to rattle around in the holes. I think that is wahat you are referring to. I also noticed that with my givi top box on thtop rack it bounced around enough to crack the aluminum. I have since removed the top piece entirely and attached the original Givi mounting rack to the lower plate. Buzzing is gone.
 

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with the givi rack sitting on the lower plate, does it still sit further back than just on the OEM tail rack?
 

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Trust me brother. If you want that vibration to stop do what I suggested above. Those captured lock nuts are the cause. Remove the top plate, place a socket (larger than the nut) under it and get a 6" 3/8 drive extension. Put the extension in the hole on top of the nut and hit that MF with a hammer like you mean it. Do that three more times and re-install.

OR

Get used to it.
 
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with the givi rack sitting on the lower plate, does it still sit further back than just on the OEM tail rack?

Yes. Because of the webbing on the Givi rack I was able to align the four threaded holes in the rack with the givi mount in a position as far back as the furthest setting on the Amoto mount. Sorry about the convoluted description.

Nomadmax is correct in that if you want to keep the top rack just knock out the nuts. My top rack cracked on both sides so I removed it.
 

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Discussion Starter #12 (Edited)
Trust me brother. If you want that vibration to stop do what I suggested above. Those captured lock nuts are the cause. Remove the top plate, place a socket (larger than the nut) under it and get a 6" 3/8 drive extension. Put the extension in the hole on top of the nut and hit that MF with a hammer like you mean it. Do that three more times and re-install.

OR

Get used to it.
Ok, i did it! Got those suckers out!
But it's still vibrating.... :mad:

I might have to try what mightyshep did.
 

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The Topcase mount was redisgned last year to eliminate the floating nut (vibrating parts) and the extra nuts in the top plate for the Monolock Adapter plate. If you have a topcase plate with the floating nuts in it, contact us as there is an easy fix for it.
 
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