Larry xlax Lovisone wrote:
> If you want to address the wobbles... concentrate on the front not the
> back of your motorcycle...

Wouldn't like to bet on that, Larry? I've fixed probably 40 headshakers
by now by replacing SA bearings. If you want to TRULY understand what's
going on, which you don't now, read SAE Pub #402, on MC dynamics and
handling. The main point would be that SA and rear wheel has about the
same masse as fork, so as itself it can have about the same resonant
frequency. No doubt about it, that can make the fork shake.

Weaves as such are a function of the resonant frquency of the entire rear
end, from SH back. That relates to a much larger overall mass and hence
the lower quoted frequasnies for weaving.

My suggestion for the headhake is exactly as someone's else: check those
SA bearings ANY play is way too much.


--


Regards, Hoyt McKagen

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While an entirely accurate statement Hoyt this thread was a month ago, been in a
timewarp ?

JL

"Hoyt McKagen" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Larry xlax Lovisone wrote:
> > If you want to address the wobbles... concentrate on the front not the
> > back of your motorcycle...
>
> Wouldn't like to bet on that, Larry? I've fixed probably 40 headshakers
> by now by replacing SA bearings. If you want to TRULY understand what's
> going on, which you don't now, read SAE Pub #402, on MC dynamics and
> handling. The main point would be that SA and rear wheel has about the
> same masse as fork, so as itself it can have about the same resonant
> frequency. No doubt about it, that can make the fork shake.
>
> Weaves as such are a function of the resonant frquency of the entire rear
> end, from SH back. That relates to a much larger overall mass and hence
> the lower quoted frequasnies for weaving.
>
> My suggestion for the headhake is exactly as someone's else: check those
> SA bearings ANY play is way too much.

John Littler wrote:
>
> While an entirely accurate statement Hoyt this thread was a month ago, been in a
> timewarp ?

It's NEVER too late to mount your favorite, worn-out old soapbox.

At least not in reeky, it isn't. Don't know about all the cross-posted NGs.
Might be that people in those places have slightly elevated standards!

Tim