Please Help!!

Feb 15, 2004
Ive been having problems with my RM250 ever since i got it which was March 2003. Its been fouling plugs left and right im lucky to get 3 days out of 1 plug. Its been oil fouling plugs for some time now but today i fixed that but now its getting carbon fouled. I got 4 hours out of one plug today. It was running great but after a couple hours it was starting to miss fire and the performance was really bad. I have no idea what can be causing this. I am running BR8ES plugs in my bike. I am really getting sick of this and i hope you guys can help me out. Thanks a ton!