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               Originally Posted by 
              Dual  
               Mine also have quite a lot of play, out of warranty 
              Would it make a difference if I make it a solid fit?
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         Have you had an 'off' at all ? 
         
        
 The rubber gromet on the Z is easily knocked out of alignment, but can be restored by loosening all the bolts, including the clamp bolts to the bars, putting them straight and tightening stuff up again. 
         
        
 It's possible that yours has been knocked and something is pushed the wrong way, making it feel lose - Worth a try ??