B-King Shimmy Dampener Question

 Was at the dealership today and noticed the shimmy dampener.

The owner of the dealership advised me that the cause of the wobbles is
airflow with an upright rider.  Is this true?

What is a shimmy dampener designed to correct and what is the cause?

Thanks.

 

Shimmy.


The Lorentz Butterfly effect.
__
Steve
.

 wrote:


A steering damper slows down the high frequency oscillations known as
a "speed wobble" or "tank slapper" as the front tire dances lightly on
the pavement.

The oscillations occur at a frequency of more than 5 cycles per second
and the rider cannot do anything about them because they start and end
so suddenly.

A speed wobble involves the front wheel and forks but the chassis
behind the steering head is NOT involved. The chassis remains vertical
while the wheel dances on the pavement and the forks oscillate from
side to side.

In the other, even more dangerous mode of chassis oscillation, the
"speed weave", the chassis behind the steering head does become
involved and the chassis rolls and yaws and even pitches a bit.

It takes a very sophisticated adjustable steering damper to do
anything with this mode of chassis oscillation as it occurs at 3 or 4
cycles per second.

As I recall, a Scott damper has the necessary adjustable low speed and
high speed hydraulic circuitry to deal with both modes of oscillation.

When a Kawasaki rider was videotaped speed weaving into a bridge
abutment,
Oasyco tried to invent a whole new term for what he was seeing, he
called it a
"rear wheel wobble".

http://groups.google.com/group/rec.motorcycles/msg/74d7aa68d2cb07e7?hl=en

 ¿ wrote:

  Bullshit


  Bullshit

  Bullshit

  Bullshit

  Bullshit

  Multi-bullshit .

  Wobbles occur because of posirive feedback in a closed system . There can
be many causes , from aerodynamics to improper rake/trail to poorly designed
suspensions which allow horizontal movement .
--
  Snag
  every answer
  leads to another
  question

 

Bullshit.