Tue, 16 Jun 1998 00:22:09 +0200 - Message No. 3397
From: Marc Luethi

Subject: Re: swinging steering


At 21:22 15.06.98 +0200, you wrote:
>Is this a usual effect or do I have to worry?

The effect is called "shimmy effect" and has to do with the proper
frequency of the suspension and the wheel frequency falling into resonance.

The main causes can be:

- loose stearing head bearing
- worn tyre (also a worn rear tyre!)
- not properly balanced wheel
- twisted fork legs (?), or even damaged ones from a fall/crash?

My new Twin mainly suffers from it, when it carries the Givi Topcase, an
only since my accident in the Albtal in early may... I have not yet figured
out the cause of the shimmy

Greets

Marc



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marc@rrr.net                                           YJ@IRC
http://zebra.fh-weingarten.de/~luethi




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