Subject: Re: high speed instability
Author: EldoMike
Date: May 31, 2002, 1:47 PM
Post ID: 1710354740
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Got to admit that my Eldo has on occasion "felt" like it might start to wobble...actually seems worse when I ride solo.....my bike is set up with police style windsheild and big leather bags...have had it over 100(according to the Harley guys that were trying to catch me...:-)
I'm installing a fairing next week just to see if it's better...
Mike
www.classicguzzi.com
www.mssells.com
----- Original Message -----
From: Greg Field
To: Loopfram-@topica.com
Sent: Friday, May 31, 2002 3:37 PM
Subject: Re: high speed instability
My understanding is that the instability happened on only a few bikes and Guzzi totally disbelieved it until one of their own people thoroughly checked out one of the wobblers to confirm that all the obvious things (steering head bearings, swingarm bearings, wheel bearings, and so on) were OK and then was seriously injured in a crash when he test-rode it.
Guzzi then took that bike and a few other wobblers back to Italy. A test rider was killed on one. After that, Guzzi and Berliner would take any bike back that was a wobbler and destroy its frame.
As far as I was able to learn, Guzzi attributed the problem to an undetermined set of individual factors on a few individual bikes that, when combined with the police windshield and rear weight loading, resulted in wobbles.
If your bike doesn't wobble by 90 mph, it probably never will. Then again, Roy Harvey's Ambo wobbled once and pitched him without (as far as I know) showing any earlier symptoms of a wobble, so maybe we should all worry, or at least watch loading and consider ditching our police shields.
Greg Field
On Friday, May 31, 2002, at 12:58 PM, Zerhackermann wrote:
I doubt that is the wheel that is wobbling. probably the tire getting a slight grab. Around here we have grated briudges, rain grooves, plastic glue on lines. all of them pull at a bike tire and make it feel like something is wrong.
Never heard of an "infamous high speed wobble" on guzzis either...did I miss something?
-----Original Message-----
From: scott kelso [mailto:fores-@conknet.com]
Sent: Friday, May 31, 2002 12:53 PM
To: Loopfram-@topica.com
Subject: high speed instability
I would like to know if any list members have experienced the infamous high speed wobble on their loopframes and would be willing to share this experience with the group.My eldo is currently shod with Conti Blitz tires,and sports wixom bags,trunk and Bates 700 fairing.I have ridden the bike at an indicated 90mph with no hint of instability,although i can feel a little bobble in the rear tire when crossing over painted lines on the highway at high speed.Im wondering if the reported episodes of instability are a sudden event or are they caused by a dynamic set in motion by a rear wheel bobble such as i feel on my bike when passing slow moving vehicles on the highway.Would appreciate any info.Next weekend at Gunstock Ski resort there is a vintage bike show&swap meet on Sat.,vintage roadrace on Sun.,and an awesome hillclimb event on Wed.Check out www.gunstock.com for info.Hope to see more than than one loopeframe there this year.Will post pics in a couple weeks.Thanks Scott K.
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<DIV><FONT face=Arial size=2>Got to admit that my Eldo has on occasion "felt"
like it might start to wobble...actually seems worse when I ride solo.....my
bike is set up with police style windsheild and big leather bags...have had it
over 100(according to the Harley guys that were trying to catch
me...:-)</FONT></DIV>
<DIV><FONT face=Arial size=2>I'm installing a fairing next week just to see if
it's better...</FONT></DIV>
<DIV> </DIV>
<DIV>Mike<BR><A
href="http://www.classicguzzi.com">www.classicguzzi.com</A><BR><A
href="http://www.mssells.com">www.mssells.com</A></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=s-@mac.com href="mailto:seen-@mac.com">Greg Field</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=Loopf-@topica.com
href="mailto:Loopfram-@topica.com">Loopfram-@topica.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, May 31, 2002 3:37 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: high speed instability</DIV>
<DIV><BR></DIV>My understanding is that the instability happened on only a few
bikes and Guzzi totally disbelieved it until one of their own people
thoroughly checked out one of the wobblers to confirm that all the obvious
things (steering head bearings, swingarm bearings, wheel bearings, and so on)
were OK and then was seriously injured in a crash when he test-rode
it.<BR><BR>Guzzi then took that bike and a few other wobblers back to Italy. A
test rider was killed on one. After that, Guzzi and Berliner would take any
bike back that was a wobbler and destroy its frame.<BR><BR>As far as I was
able to learn, Guzzi attributed the problem to an undetermined set of
individual factors on a few individual bikes that, when combined with the
police windshield and rear weight loading, resulted in wobbles.<BR><BR>If your
bike doesn't wobble by 90 mph, it probably never will. Then again, Roy
Harvey's Ambo wobbled once and pitched him without (as far as I know) showing
any earlier symptoms of a wobble, so maybe we should all worry, or at least
watch loading and consider ditching our police shields.<BR><BR>Greg
Field<BR><BR>On Friday, May 31, 2002, at 12:58 PM, Zerhackermann
wrote:<BR><BR>
<BLOCKQUOTE><?fontfamily><?param Courier><?color><?param 0000,0000,FFFF><?smaller>I
doubt that is the wheel that is wobbling. probably the tire getting a slight
grab. Around here we have grated briudges, rain grooves, plastic glue on
lines. all of them pull at a bike tire and make it feel like something is
wrong.<?/smaller><?/color><?/fontfamily><BR> <BR><?fontfamily><?param Courier><?color><?param 0000,0000,FFFF><?smaller>Never
heard of an "infamous high speed wobble" on guzzis either...did I miss
something?<?/smaller><?/color><?/fontfamily><BR> <BR><BR><BR><?smaller>-----Original
Message-----<BR><B>From:</B> scott kelso
[mailto:fores-@conknet.com]<BR><B>Sent:</B> Friday, May 31, 2002 12:53
PM<BR><B>To:</B> Loopfram-@topica.com<BR><B>Subject:</B> high speed
instability<BR><BR>I would like to know if any list members have experienced
the infamous high speed wobble on their loopframes and would be willing to
share this experience with the group.My eldo is currently shod with
Conti Blitz tires,and sports wixom bags,trunk and Bates 700 fairing.I have
ridden the bike at an indicated 90mph with no hint of instability,although i
can feel a little bobble in the rear tire when crossing over painted lines
on the highway at high speed.Im wondering if the reported episodes of
instability are a sudden event or are they caused by a dynamic set in motion
by a rear wheel bobble such as i feel on my bike when passing slow moving
vehicles on the highway.Would appreciate any info.Next weekend at Gunstock
Ski resort there is a vintage bike show&swap meet on Sat.,vintage
roadrace on Sun.,and an awesome hillclimb event on Wed.Check out <U><?color><?param 1999,1999,FFFF>www.gunstock.com<?/color></U> for
info.Hope to see more than than one loopeframe there this year.Will post
pics in a couple weeks.Thanks Scott
K.<?/smaller><BR><BR><BR><BR></BLOCKQUOTE></BLOCKQUOTE>
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