Re: [St] Shimmy, shake, wiggle, waggle, whatever...

["Young, Mike" <myoung@xxxxxxxxxxx>]

Chain too tight?
Rear sprocket not quite concentric with rear axle?
Might be both; with a correctly adjusted chain you won't necessarily
notice the sprocket issue.
Don't ask me how I know to ask that...

Mike 
'06 ST
Seattle
 
 
-----Original Message-----
From: st-bounces@xxxxxxxxxxxxxxxxxxxx
[mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Dan Wallander
Sent: Thursday, July 31, 2008 6:11 AM
To: ST@xxxxxxxxxxxxxx
Subject: Re: [St] Shimmy, shake, wiggle, waggle, whatever...

Vibration can come from the rear too.  Check the balance on that.
Check your tire pressures
Check your steering head bearings
Check your rims for round - have you hit a chuck hole lately
Check that your front axle and rear nut (no, not the passenger) are
torqued 
correctly
Broken belt in a a tire - got any bulges


Does it happen with the clutch in and out?
Does it happen in any gear at that speed?

Could be a combination of factors.
Check your throttle body synch.

Dan Wallander
Rio Rancho, NM  87124


> I have a question. I've got a '99 ST and it's got a strange vibration
at
> highway speed. I can describe it as a varying amplitude (from 0 to
full
> wiggle on about a 1 Hz cycle) with a frequency of about 6 Hz. If this 
> makes
> any sense...
>
> I can feel it in the grips, but it's not all that bad. What it does do
is
> wiggle my windscreen and mirrors, making it difficult to see if
there's 
> any
> constabulary behind me. I don't think it's my front tyre, as I just
had it
> replaced and balanced. Besides, it was doing this before the tyre
swap. 
> The
> frequency doesn't change significantly (as in, I cannot tell a
difference)
> with different engine speeds (I can guarantee it's not the engine).
It's 
> not
> changing with different velocities, however, the vibration doesn't
really
> become noticeable until about 65-70 mph.
> 
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