Hi all... I have a 04 CRF250X model... I have been searching all over the net to try and understand the general rules for a flat CR carb jetting.. most have there own ideas of what runs good at what sea level etc... Im looking to find out the FACTS /general rules to what jet numbers to use to stay in spec which each other when changing.. Im at sea level in Brisbane , Australia... 1. pink wire mod done. 2. Airbox top cut out.. 3. standard exhaust Some are using a range of MAIN jets between 148-165.. Is there a rule of thumb in numbers Ie, 160 main jet 42 pilot jet, if changed one would the other have to change?? In my bike i have the 1. Main= 168, 2. pilot = 40.(i think its the pilot) 3. one of the Two jet around the main .. 80( carnt quite make out number but looks like 80) 4. There ia also another jet that on the air box intake side, slightly of centre... This one is 100...What is this one??