My riding partner just got an 06 WR, and just took the AIS system off. He spent the money, and put the whole GYT-R AIS removal kit on, and I was blown away with how great the bike was- I love my 04, but the 06 seemed smaller, and was so much easier in the trails. sitting next to my bike- you could really start seeing the changes, the triple clamps w/ adjustable bars, the way smaller tank, seat, and it seemed as if the suspension was changed. The 06 WR has that real sweet trail computer, that is easy to read and use. Now if they will just put the YZ aluminum frame on the next year, I might have a great reason to trade.