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Path: utzoo!watmath!clyde!burl!mgnetp!ihnp4!mhuxl!houxm!vax135!cornell!uw-beaver!ssc-vax!fluke!marauder
From: marauder@fluke.UUCP (Bill Landsborough)
Newsgroups: net.cycle
Subject: Re: Yamaha 650 that jiggles - (nf)
Message-ID: <1797@vax4.fluke.UUCP>
Date: Thu, 23-Aug-84 20:16:15 EDT
Article-I.D.: vax4.1797
Posted: Thu Aug 23 20:16:15 1984
Date-Received: Thu, 30-Aug-84 00:34:51 EDT
References: <521@umn-cs.UUCP>
Organization: John Fluke Mfg. Co., Everett, WA
Lines: 24

There are several reasons why this can happen... shocks, 
lack of a steering dampner, loose wheel spokes, etc. but
a couple you might seriously consider are:

*  The fairing is probably a handlebar mount and therefore
adds 25 or so pounds to the heaviness of your steering and 
then the shape of the fairing causes the wind to push it one
way.  Once it reacts to that push the shape of the fairing
has changed in relation to the wind and therefore pushes it
the other way.  This sets up an occellation back and forth
causing the wiggle.

*  This one actually happened to me on a race bike.  The front
tire was out of balance.  Not in the normal sense that you
think of balance where one END of the circle is heavier than
the other but that one SIDE was heavy then rotating around 
180 degrees the other SIDE was heavy! (hard to explain)
What it did was cause violent shaking, not bounce of the front
wheel. Talk about wierd.

Anyway, hope these and other inputs help.

Bill Landsborough