get a 06/07 throw either a HC2 in it or a 02 crf, a nice topend exhaust (dasa), green wire mod, drill out the T-vent, and if you have the money port and polish the head. And if you have the money to afford race gas i would also suggest a 14:1 comp piston, thats a lot more maint though and the machine wont be as reliable with that piston.