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               Originally Posted by 
               fridolin 
                
               
             
              I run my ten with a K&N air filter for almost 70000 km. No problems with fuel mixture or damaged engines.
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         Fine, so have I on a transalp. But the OP is reporting running problems associated with lean running apparently caused by fitting a new filter. It makes sense to roll back the changes until he can do something about the lean running. 
         
         
        
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