Subject: RE: high speed instability
Author: Zerhackermann
Date: Jun 3, 2002, 1:13 PM
Post ID: 1710367315
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that's different. that's side winds or pressures affecting the sheild.
one of the hazards of running one. If you want to lessen it, use a frame
mounted fairing. then the input is to the whole bike rather than just
the forks. still that wil only mitigate the issue.
-----Original Message-----
From: Ian Adkins [mailto:ianad-@linkamerica.net]
Sent: Saturday, June 01, 2002 6:49 AM
To: Loopfram-@topica.com
Subject: RE: high speed instability
My 69 wobbles with the Police Shield. Seems to be worse with a cross
wind.
When I was riding back home from the MGNA Open House I was giving my
riding buddies Frank Wedge and Bob thrills and chills everytime I passed
a big truck. The thing would start to get the shakes. Never amplified to
a dangerous point though.....still...after hearing Dennis' story you
wonder when that time will come.
Regards...Ian
-----Original Message-----
From: EldoMike [mailto:msse-@classicguzzi.com]
Sent: Friday, May 31, 2002 4:51 PM
To: Loopfram-@topica.com
Subject: Re: high speed instability
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 <mailto:seen-@mac.com>
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><SPAN class=994241120-03062002><FONT face=Courier color=#0000ff
size=2>that's different. that's side winds or pressures affecting the sheild.
one of the hazards of running one. If you want to lessen it, use a frame mounted
fairing. then the input is to the whole bike rather than just the forks. still
that wil only mitigate the issue. </FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Ian Adkins
[mailto:ianad-@linkamerica.net] <BR><B>Sent:</B> Saturday, June 01, 2002
6:49 AM<BR><B>To:</B> Loopfram-@topica.com<BR><B>Subject:</B> RE: high
speed instability<BR><BR></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=580300804-01062002>My
69 wobbles with the Police Shield. Seems to be worse with a cross wind.
</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=580300804-01062002></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=580300804-01062002>When
I was riding back home from the MGNA Open House I was giving my riding buddies
Frank Wedge and Bob thrills and chills everytime I passed a big truck. The
thing would start to get the shakes. Never amplified to a dangerous point
though.....still...after hearing Dennis' story you wonder when that time will
come.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=580300804-01062002></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=580300804-01062002>Regards...Ian</SPAN></FONT></DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> EldoMike
[mailto:msse-@classicguzzi.com]<BR><B>Sent:</B> Friday, May 31, 2002 4:51
PM<BR><B>To:</B> Loopfram-@topica.com<BR><B>Subject:</B> Re: high
speed instability<BR><BR></DIV></FONT>
<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><PRE>==^================================================================
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