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               Originally Posted by 
              Ohlins  
              I wonder how you can have a spark plug 6mm too far into the barrel?...Problem with cylinder head machining?....too little threads cut into same?
                Weird
               
               
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         Indeed it is strange. It might not even be a machining issue - it could be something as simple as a batch of motors were fitted with the wrong plugs? Maybe they had the wrong reach, or maybe the washers were missing from them?
         
        
 All the same, it is a bit weird. Even weirder is that nobody seems to have heard about it??