Well, first thanks to you guys for the great information and posts on Jetting. The archives are a great wealth of information. My WR426F was so rich when I bought it, it was really a shame. I have it close now, thanks to you guys, see my sig.. However, I want to go to the next level. Taffy, I am going to the Yamaha dealer today and buying the exact same jets and needle as you. I have 2 questions. 1. Since my bike is a '02 WR426F without BK mod, etc..., is the jetting still the same as your bike? Are the carbs the same? If not, what should I change 2. I ride at Hungry Valley, California. Same temp. as Australia and roughly between 3K - 5.5K feet. Should I change the setup in your sig. to accommodate or not. Please give me your recommendations. Thanks in advance for all your help. It was so much easier to jet my old bike, a XR650L. Anyway, the WR is a way better and more fun bike.