Thread: ST4S vibration
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Old 30-Dec-2005, 12:03
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Derek Derek is offline
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Bikes: ST4s ABS
 
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Join Date: Aug 2003
Mine had similar problems until I loosened the chain. A buzz at around 30-35mph with vibration through the bars and a howl at around 60-65mph (twice the frequency?). I thought a rear wheel bearing, or worse the gearbox output shaft bearing, was at fault. Make sure that there is at least an inch and a half movement of the chain. This is more than the manual says but it seems to need it. I know of another ST4s owner who has also experienced this.
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