Polaris Sportsman Wobbling
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If you have the older model with the u-joint drive shafts like the original poster had,worn u-joints can cause problems like this. Just check for excessive u-joint play when jacked up. Turn the wheel back and forth and look at the u-joints and yokes.If really worn u-joints can wallow out the yokes if this happens cheaper to replace these drive shafts if this happens.Expensive drive shafts and you can't convert to cv drive shafts.