I just picked up an 06 YZ450 (upgraded from my trusty 02 426) and was wondering if there are any words of wisdom about known issues. I have not been monitoring thumpertalk. I plan to break it in on Saturday at Washougal and if all goes well race there Sunday. About the only thing I have picked up in here so far is that they tend to be lean. I plan on having a #45 and a #48 pilot jet on hand, as well as other mains. I figure all you guys who have had them for a year now have everything ironed out. Thanks.