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Re: [ST] Vibration & wrong tune
- Subject: Re: [ST] Vibration & wrong tune
- From: Charlie McCullough <charliem90@xxxxxxxxxxxx>
- Date: Fri, 16 Aug 2002 09:42:39 -0400
At 07:37 PM 8/15/02, Sean Baumann wrote:
>So, tell me about the balance shaft. What could cause it to go out of
>alignment? I read somewhere that it is by jumping a tooth? Is this a
>tooth on the sprocket (front or rear)? Well, my dealer did switch my
>front sprocket out last month. Could they have done something wrong to
>cause a problem with the balance shaft?
I wouldn't worry about the balance shaft. The vibration that's been
described in this thread doesn't sound anywhere serious/severe enough to be
caused by mis-aligned balance shaft gear.
Generally.....when you get a balance shaft mis-aligned it's damn near
physically impossible to hold on to the clip-ons the vibration is so
intense/violent. Like trying to hold on to one of those small hand-held
rotary sanders.
What is possible - and can cause vibration more like what's been described
- - is a spun bearing. But even that is pretty unambiguous. None of this "I
say it's not normal and my dealer says it is" kind of stuff.
I'd suspect a problem in the ignition/FI. Either a bad FI map or throttle
body problem causing rough idle/low-end revs.
Charlie McCullough
tz250 WERA#90
Duc 748
Triumph ST
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