First, I assume the '09 comes with the new steering head bearing, I have read that the "new" ones have some type of seal. Is my assumption right or should I be looking for a new bearing? I have also read that the GYTR offroad flywheel is a must for offroad. Is it also a worthwhile upgrade if I only ride MX? Also, it seems the exhaust cam from an '06 would wake up the bottom. Wondering what the consesus is, is the cam "needed" if you put on a good exaust? If someone was going to only do one (the cam or exhaust) which would be the best bang for your buck (assuming a Dr. D system was the choice for exaust).