I just baught a jd jet kit online for my 03' cr 250r and the kit they sent me is for 04'-07'.. I think they are the same but just want to make sure before I use it.
+1 with what foxforks said, I found JD's customer service to be awesome. As for your kit, I believe the 01' to 03' comes with an S-4 nozzle (needle jet), 04' to 07' doesn't.