If I were you I would join FaceBook (If your not already) Look for the group KX Guru Racing. You will have access to many Kawasaki factory Techs and a Engineer who helped build and develop the big bore KX's for Kawasaki. Tom Morgan, Doug Haas, David Pyle, John Braasch and others. I own 3 different Air cooled KX500's and the help and advice has been invaluable.