OK so i am currently attempting to adjust the valves on my 250 sxf. so far i have got the clearances and then attempted to remove the cam chain tensioner i first remove the 17mm nut on the outside(also oil has not been removed). this is all fine i then go to remove the 21mm nut that holds the tensioner in and this does not budge. i try to put all my weight on this and it will still not budge unfortunately because of the placement of the cam chain tensioner relevant to the frame of the bike i cannot fit a socket in and thus a breaker bar. though i am afraid that im going to end up stripping the bolt. so i dont know what to do is the thread opposite so do i torque it clockwise. do i need to remove the oil. please help.