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Discussion Starter · #1 ·
Hi all,

I think I may have posted on this subject before but I am still wrestling with this problem. I now have almost 1100 miles on the beast and the resonance shows no signs of going away, and I have not yet figured out what is causing it. I have tried putting rubber between the license plate mount and the mud flap and that did nothing to quell the vibration....has anyone of you figured out what causes it??????
 

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dont know, mine does not have any noises that it shouldn't.

jason
 

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I've got the same problem, typically at about 20-30 mph. From what I've found, it seems to be the cowling just under the brake lites. I believe it's the battery cover. I am thinking of placing two rubber washers between the cowlings just to tighten them up. That should do the trick. Ride safe all.
 

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Living on a red clay and sand road my scoot picked up a buzz like sound. It turned out to be the tail cover. It's the piece that on top of the handle that goes around the seat just behind the passenger seat, it has to screws that holds it on under the handle and slides under the passenger seat. I put a piece of soft foam under it and screwed it back down. Not a peep from it . you might have passenger ride with you and listen and or touch parts to see where they might be coming from. Beware of hot and moving parts and be safe. Hope this helps !

Rob
 

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Discussion Starter · #5 ·
Thanks for the tips guys, we'll give each of those ideas a try and see what fixes it...when I have something worthwhile to share I will pass it on!
 

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Robert Colley said:
Living on a red clay and sand road my scoot picked up a buzz like sound. It turned out to be the tail cover. It's the piece that on top of the handle that goes around the seat just behind the passenger seat, it has to screws that holds it on under the handle and slides under the passenger seat. I put a piece of soft foam under it and screwed it back down. Not a peep from it . you might have passenger ride with you and listen and or touch parts to see where they might be coming from. Beware of hot and moving parts and be safe. Hope this helps !

Rob
Oh yeah, that piece of plastic does vibrate, but I've just come to ignore it. It is only held on by the two screws under the grab rail. The front half has tabs that slide into loops under the pillion seat to align it. But these tabs don't hold it tight. If you put some little rubber pads beneath the front edges it would probably elimnate the vibration buzz.

Hey hotshoetom, Remove your pillion seat and check to see if the part is installed correctly. A lot of the plastic parts on mine were not properly aligned. I don't know who built mine, but it must have been on a Friday afternoon as I had to fine tune a lot of the final assembly to get the proper fit.
 

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Discussion Starter · #7 ·
Robert,

I may try that...but first we'll try the rubber shim trick between the plastic panels and the brake light. If I have to take the pillion seat off I will...on second thought, I have to pull some of the tupperware anyway to get to the turn signal and brake light wiring so I can hook up the lights in the top box. Maybe I could kill two birds with one stone...maybe I should start with the panel around the brake light assembly and go from there. Thanks for the ideas!!!
 

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I get a vib from the right side panel, in the back by the light. Small shim solved it.

Oddly, I changed my oil at 3000km yesterday, and the bike has become quiter? Weird.
 

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Discussion Starter · #9 ·
Hi Red,

What did you use for a shim and where did you place it???
 

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Discussion Starter · #10 ·
Well guys,

Here is the cure...the rear springs go into resonance at about that rpm...I stuffed a piece of foam rubber between the spring coils and the body of the rear shocks and that stopped the vibration. Now to find a cure that isnt so dam* ugly...I spend so much time in city traffic where I am right at 4000 rpm it is worth it to me to make it ugly to fix the vibration. On the road, it isnt much of a problem, once above 4100 rpm it never appears. Any ideas what could be used to damp out the springs and not look bad???? All suggestions welcome...
by the way, happy 4th!!!! Enjoy!
 

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Discussion Starter · #11 ·
Hi aall,

Well, the foam rubber worked for a while damping the 4000 rpm resonance out of the rear springs. I need to replace the foam with something a little tougher, and a lot less ugly. Anybody got any ideas???
 

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hotshoetom said:
Hi aall,

Well, the foam rubber worked for a while damping the 4000 rpm resonance out of the rear springs. I need to replace the foam with something a little tougher, and a lot less ugly. Anybody got any ideas???
You must have amazing hearing because I don't hear anything but the wind!
 

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Discussion Starter · #13 ·
Black Sheep,

Most of my riding during the week is at speeds under 40 mph, in fact it hovers in the 30-40 range most of the time. At 4000-4100 rpm at those slow speeds you can hear and feel the vibration from the rear springs going into resonance. It is most annoying when you hear it most of the time. On weekend rides that are usually above 40 mph, it isnt an issue and yes, the wind noise drowns out a lot.

Cheers!
 

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Sorry to hear your problem Tom you might try removing and swapping the shocks from side to side. That might just be enough to throw off the resonance also I have seen rubber shock cover that would dampen and wouldn't look half bad. Rob
 

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If you go to the hardware story and get the rubberized styrofoam mat, people use in work shops. It's grayish black in color and is flexible enough to install it. I did it to mine and you don't even notice it. Ride safe all.
 

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Discussion Starter · #16 ·
I'll have to check that out. Many thanks for the replys guys. Hope you all have a great week!!! Ride safe...

vroom vroom! :)
 

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After I disconnected my side-stand kill-switch it was very obvious that the shock springs/coils were the culprit. Have not found a way to fix it as it is extremely annoying when warming up. It doesn't even vibrate anymore while riding, but now only when starting up from cold on the side-stand while it slowly adjusts its idle speed.

I will brainstorm a bit with some mechanically inclined friends. :eek:ccasion5:
 

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Discussion Starter · #18 ·
I think the rubberized matt is the best idea I have heard so far. My rather in-elegant solution of using foam rubber at the bottom of the rear coils works fine and I never hear the vibration anymore, but I would like to do something 'prettier' with it. Using the dark colored rubberized mat sounds like a pretty good solution. I was also thinking about a piece of carpeted floormat from a car I no longer own...slipped up inside the coil up near the top where it would be hidden would work great. It has a non-slip finish on one side and carpet on the other, so it would not restrict the suspension action. Any thoughts on that Texas?

Cheers!
 

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My problem wasn't the springs. But a rattle from the back that I thought was one of the plastic covers or the rear side reflectors. What it turned out to be were 2 aluminum spacers under the passenger seat. A little electrical tape and no more rattle. They sounded so much like plastic rattling it took me 2 days to figure it out.
 

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Still trying to pinpoint exactly where the spring is hitting the shock, I can see it moving, but not the impact spot ... that might shed more light.

I, too, could have sworn to have heard plastic rattles, but if I did, they are long gone now ... worked themselves out I suppose. As for the shock springs, it doesn't do it anymore while riding, only on startup if on the sidestand.

I could not get it to happen yesterday, making it more difficult to figure out a cure.
 
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