Brian, I am in a similar situation. I am trying to set my 02 SX250 up for more woods type racing/riding. I currently race MX but am getting tired of the long days,little saddle time and poorly prepared tracks. My plan is to get the FMF Gnarly pipe for more low end, possibly the EXC OEM flywheel, if it fits and maybe a tooth or two on the rear. I will soften up the suspension as much as I can without a revalve(the 02 SX suspension is awesome). I have already ordered the KTM tall seat that they offer. Oh yea, I already have the Oberg 18mm offset clamps for quicker turning. Keep us posted on your mods and results.
Ken