Somender,

     To let you know - John John (JJ) took Western Canadian Championship on 85 Yamaha with Somender's 5 groove set-up.  Shaving head 10 thou out-performed 3 groove.  Jet sizing way down - performance way up.  4 stroke Honda was hole shotting 90% of every race.    Thank you very much for helping us out.  Happy New Year & best wishes to you and yours.  kp / whitecourt