05yz250f jettings?

[snosurfer05]

i race hare scrambles down in florida w/FTR. now with that being said i just got an 05yz250f. the previous owner rode the bike at local tracks and had no issues with noise. i have the stock pipe and header that i want to put back on because its way too loud. i asked the guy if he had the stock jettings and he said no, then he proceeded to tell me that if i put the stock jetts back in it really shouldn't make that big of a difference seeing as how i'm in florida. the exhaust on there now is made by WPM proformence...(i know i never heard of them either)...any suggestions? do you think i can run the jettings that are in it now?