hi i have a 400ex that has a 426 kit and thats about it i know i really need to get a pipe and a cam to see its full potential but the rebuild on the motor left me broke,it has a 160 jet and a 42 pilot jet,if you have a 426 kit what main and pilot jet do you run im just trying to get and idea if im close ,it seems to run good but every once in a while it will burp through the carb and i dont think it is running to its full potential i have adjusted the air screw in and out and adjusting it out seems to help the burping through the carb issue but it still does it sometimes