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Author Topic: High Speed Wobble CRASH  (Read 11115 times)

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RedDevil

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Re: High Speed Wobble CRASH
« Reply #60 on: January 31, 2008, 12:59:06 PM »


I'd be in the same choir.
I'd have to agree with that sentiment also. 

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magic-rat

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Re: High Speed Wobble CRASH
« Reply #61 on: February 06, 2008, 10:06:06 PM »

At Maggie Valley this year on the way home from a "gap" run, I watched a CVO Harley (Pete) do that.

I had cameras rolling but we were on a wide open 2 lane road with nobody around and he was in the lane next to me just off camera.

Essentially, it kicked in someplace between 90 and 110 mph on a very slight bend in the road ... max 10 degrees ... probably closer to 8 ... very subtle turn.  The bike seemed to kind of "resonate" ... sorta bounce about an inch up and down and maybe 1/4" to the right and left.

It was the back of the bike that was doing this (not the front) ... and it was very visible to me following on his back right.

I actually slowed down when I saw it because I wanted to put some distance between us in case he needed some space to recover.  He slowed down, too.  It definitely looked like it had the potential to turn into a tank slapper.

At the next stop, he told me it was a "known problem" and that when he felt it he backed off.
« Last Edit: February 06, 2008, 10:10:49 PM by magic-rat »
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Mikey

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Re: High Speed Wobble CRASH
« Reply #62 on: February 06, 2008, 10:56:13 PM »

My local dealer service department told me these bikes are not designed or tested to run 100 mph. Harley does not admit a wobble exists. I notice rear tire air pressure effects the wobble a lot.
I collect Classic Muscle Bikes, mostly three and four cylinder, and most of them have hand adjustable steering dampers on the steering stem. As Harley calls, adjusting the swing. Some have hydraulic steering dampers on the side also.
These are designed to prevent tank slap. The faster you ride the tighter they need to be. That stops the wobble. That might be a nice upgrade for Harley.
Mikey
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arcticdude

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Re: High Speed Wobble CRASH
« Reply #63 on: February 08, 2008, 09:39:21 AM »

Has anybody "upgraded" from a Road Glide to an Ultra (or SE Ultra)?   :confused5: 

The wife went from her 01 SERG to the 06 CUSE and definnitely noticed a difference.  The SERG is MUCH more stable at speed than the CUSE (or ANY ultra, for that matter).  It handles better at low speed once you get over the size of the fairing in front of you.  One of the reasons the Goldwing does so well is it's frame mounted faring.  It doesn't push the bike around like a fork mounted one does.  You'll ONLY see frame mounted fairings on high speed bikes because of the handling abilities.  We met a couple at the 2002 Alaska State HOG rally on a new "Ultra Road Glide".  We got chatting with them and found the had a brand new Ultra, rode to one of the demo ride sites that year, road a Road Glide and immediately traded the Ultra for the Road Glide!  They couldn't believe the difference.  Ask the guys who ride the Road Glides, they'll tell you what's what!  If the moco would build a SERG with a full sized tourpak, CB and the other goodies you find on an Ultra, there'd be 2 in our drive.  The batwings LOOK better, but ain't chit when you want to "ride". ;)

arctic
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megavolt17

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Re: High Speed Wobble CRASH
« Reply #64 on: February 09, 2008, 11:25:38 AM »

The wife went from her 01 SERG to the 06 CUSE and definnitely noticed a difference.  The SERG is MUCH more stable at speed than the CUSE (or ANY ultra, for that matter).  It handles better at low speed once you get over the size of the fairing in front of you.  One of the reasons the Goldwing does so well is it's frame mounted faring.  It doesn't push the bike around like a fork mounted one does.  You'll ONLY see frame mounted fairings on high speed bikes because of the handling abilities.  We met a couple at the 2002 Alaska State HOG rally on a new "Ultra Road Glide".  We got chatting with them and found the had a brand new Ultra, rode to one of the demo ride sites that year, road a Road Glide and immediately traded the Ultra for the Road Glide!  They couldn't believe the difference.  Ask the guys who ride the Road Glides, they'll tell you what's what!  If the moco would build a SERG with a full sized tourpak, CB and the other goodies you find on an Ultra, there'd be 2 in our drive.  The batwings LOOK better, but ain't chit when you want to "ride". ;)

arctic

After riding a Road Glide for 10 years I do notice a difference in the handling of my new Ultra Glide.  I like the look of the UG and the engine and brakes are a step up, but I do not like any wind or trucks at high speed.  It buffets so much when you are following a truck, or any large vehicle.  It fights going straight when there is a cross wind.

We had a warmer than expected day this past Thursday and I took my bike to work.  I road on I81 and took it to 75mph and there was a long stretch and I thought I'd see how it accelerated and give the engine a chance to break in at a higher speed.  I pushed it quickly to 90mph in 6th and as I passed a semi and was about to slow down and pull back into the slower lane I thought I was experiencing a wobble.  Once I finished the pass it stabilized and I had no problem with the rest of the trip.  I don't think it was a wobble, I think it was buffeting from the wind off the truck, but I am not 100% sure.  :o

I never thought about wind, cross wind, truck passing, etc. on my RG.  I am a bit anxious about what will happen the next time I pass a truck.  Does anyone make a kit to mount the Ultra's fairing to the frame?  If it's under $5,000 I'm doing it, no hesitation.  Are there any suspension or other parts I could add to lessen this buffeting effect?  :confused5:

I will probably get used to the handling, but I have to agree that I think this bike is inherently less stable then my last.  I will likely comply with doing the speed limit more often in the future.  The way I feel now if they come out with a SE Road Glide in the future I may trade for it.  I added an Ultra Kit to my old RG so I had the CB, rear tour pack, cruise control,etc.  This was not an enjoyable ride home!  :(
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Re: High Speed Wobble CRASH
« Reply #65 on: February 09, 2008, 01:56:27 PM »

After riding a Road Glide for 10 years I do notice a difference in the handling of my new Ultra Glide.  I like the look of the UG and the engine and brakes are a step up, but I do not like any wind or trucks at high speed.  It buffets so much when you are following a truck, or any large vehicle.  It fights going straight when there is a cross wind.

We had a warmer than expected day this past Thursday and I took my bike to work.  I road on I81 and took it to 75mph and there was a long stretch and I thought I'd see how it accelerated and give the engine a chance to break in at a higher speed.  I pushed it quickly to 90mph in 6th and as I passed a semi and was about to slow down and pull back into the slower lane I thought I was experiencing a wobble.  Once I finished the pass it stabilized and I had no problem with the rest of the trip.  I don't think it was a wobble, I think it was buffeting from the wind off the truck, but I am not 100% sure.  :o

I never thought about wind, cross wind, truck passing, etc. on my RG.  I am a bit anxious about what will happen the next time I pass a truck.  Does anyone make a kit to mount the Ultra's fairing to the frame?  If it's under $5,000 I'm doing it, no hesitation.  Are there any suspension or other parts I could add to lessen this buffeting effect?  :confused5:

I will probably get used to the handling, but I have to agree that I think this bike is inherently less stable then my last.  I will likely comply with doing the speed limit more often in the future.  The way I feel now if they come out with a SE Road Glide in the future I may trade for it.  I added an Ultra Kit to my old RG so I had the CB, rear tour pack, cruise control,etc.  This was not an enjoyable ride home!  :(

The buffeting is never going to completely go away, but it can be MUCH, MUCH improved (the total stability of the bike) with the Traxxion AK-20 cartridge forks and better (Bitubo) rear shocks.  You would be amazed at how much different the bike feels with the fork upgrade.  On a RG, I would guess the difference in handling would be even more dramatic.
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Twolanerider

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Re: High Speed Wobble CRASH
« Reply #66 on: February 09, 2008, 02:54:05 PM »

There is also one little (and cheap) thing that can help the buffeting on an EG a surprising amount.  It's that little wind baffle more commonly used on Road Kings.  58520-79TC.  This thing:
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Hobo

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Re: High Speed Wobble CRASH
« Reply #67 on: February 09, 2008, 03:09:39 PM »

I added that to the SERG and it noticably helped the wind turbulance that comes from between the gas tank and fairing. Well worth the money weather it helps the wobble or not.

Hobo
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spydglide

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Re: High Speed Wobble CRASH
« Reply #68 on: February 09, 2008, 03:20:35 PM »

Will it make my motor run cooler?  :nixweiss:  spyder
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Hobo

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Re: High Speed Wobble CRASH
« Reply #69 on: February 09, 2008, 03:50:29 PM »

Will it make my motor run cooler?  :nixweiss:  spyder

I don't think it does, but did really help turbulance behind the winshield.

Hobo
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Fired00d

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Re: High Speed Wobble CRASH
« Reply #70 on: February 09, 2008, 03:55:44 PM »

Will it make my motor run cooler?  :nixweiss:  spyder
It's chrome it doesn't have to. ;) :huepfenjump3: It is on a :pumpkin: I know of. :D

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ccr

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Re: High Speed Wobble CRASH
« Reply #71 on: February 09, 2008, 04:02:13 PM »

Will it make my motor run cooler?  :nixweiss:  spyder
Definately will make the SEEG look cooler.   ;)
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Twolanerider

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Re: High Speed Wobble CRASH
« Reply #72 on: February 09, 2008, 05:24:14 PM »

Will it make my motor run cooler?  :nixweiss:  spyder

Who knows for sure :nixweiss: ?  It does help the turbulence.  It at least doesn't hurt engine temps; even with lowers on.
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REGGAB

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Re: High Speed Wobble CRASH
« Reply #73 on: February 09, 2008, 05:35:15 PM »

There is also one little (and cheap) thing that can help the buffeting on an EG a surprising amount.  It's that little wind baffle more commonly used on Road Kings.  58520-79TC.  This thing:

Really?  Stock?  Hmmmmmmmmmmmmmmmmmmm.
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REGGAB

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Re: High Speed Wobble CRASH
« Reply #74 on: February 09, 2008, 05:36:49 PM »

It's chrome it doesn't have to. ;) :huepfenjump3: It is on a :pumpkin: I know of. :D

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OK..........I'll laugh at that.   ;)
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