Have just bought a 2014 Racing 250 which hasn't had much use, rather nice in fact. 
  
However, the clutch action isn't as good as other Gassers I've tried - it's a bit heavy and not so smooth in takeup so I have pulled it apart. 
  
The pack thickness is 9.8mm and the lever height is 15.2mm 
  
So, how much do I have to reduce the pack by to get the desired 17 - 18 lever height?  Or should I just get new plate set?