Hi,
        
 i'm having a problem with the gear shifting on my 2011 xtz660.
        
 it has around 55k KM on it.
        
 when shifting gears, i have to press/pull hard on the pedal and it feels there is a "step" in the middle. 
        
 does it have any connection to the fact that i changed oil ? (to 15w50).
        
 if any easy solution i'll be trying myself - if not - to the garage.
        
 thanks 
        
