On my 2000 WR I ran a 52 tooth rear with stock length chain to shorten the wheal base and add torque. On my 04 WR450 I figured the extra 50cc will be enough extra grunt not to need the gearing change. I was reading a review on the WR's in Dirt Rider and they recommended changing the gearing to a 52 in the rear. What do you guys think? I run hairscrambles in tight east coast woods so I like the low end grunt. I have not had enough seat time on the new ride to feel all this stuff out yet.