Well, you guys were right. The WR450 is a joy to ride on the trails. After removing the AIS and rejetting the bike, I hit the trails today. The power was much more containable then I expected. In fact, probably so much that my concerns for opening up the intake and exhaust are much less. Not sure Im going to do it quite yet, but Im not real worried about it now either. The bikes power was very consistent across the rpm range. I didnt experience any "hard hits" in power that would catch me off guard. Suspension needs a bit of dialing in, but not too bad. Especially coming off the WRR. Im still not real clear on all the posting about chaning the shock spring. Last night, in preperation for today, I checked the sag numbers, and everything seemed inline. I made a "very" small adjustment in spring tension, but otherwise my sag numbers were consistent with what would be expected. Rider Sag was 108 Free Sag was 44 I know the free sag isnt quite as close to the "middle" as I would have like to see, but still within "tolorances" so to speak. Anybody else want to chime in on this? Thanks....Later.