Ok, been through all the archives and any subject regarding WR426 jetting and heres my conclusion...I have a 02 WR426 Canadian model, Big Gun race series pipe, air box lid off and going to YZ timing soon. If I'm comprehending everything right I should go to stock YZ jetting as a baseline right ??? Is there a difference between US and Canadian stock jetting for YZ's and if so does anyone know what the stock numbers are ? I hate to ask my dealer for anything more than the time, they are not very accurate on things.