need power fast!!

Ok heres the deal I am drag racing my 250ex at the local fair Wednesday and I need some help on how to open up the exhaust to get a little more power out of it untill i get a pipe. Also I was thinking about running with the airbox lid off. Finally I have a couple larger jets that might fit what size should I use. ANY responses will be greatly appreciated!!!!!!!!!:square

c'mon guys any idea

about all you can do on such short notice is remove the airbox lid & make sure you have some good tires for hook up. remove anything that adds weight. good luck

ok......duncan makes their dual barrel pipe for a 250ex. i think that would be your best bet