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               Originally Posted by 
               senokone 
                
               
             
              He said it won't do 
              much harm and will 
              probably operate fine.
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         That 'mechanic's' statement doesn't exactly inspire one with confidence! 
        
         
         Seriously though, just fitting exhausts alone (custom or otherwise) will NOT cause you or your bike any issues/problems. You certainly aren't going to hole a piston! You'll be fine. Go ahead...