I've just been out to get an 01 YZ426f... and I am very pleased with it at the least . Power delivery is awsome and its already got the 450 cam so thats a bonus! I decided to go with the 426 after reading a load of threads about people in the same situation as me, wondering if their worth buying or not. And i have to say everybody who posted were a great help so i just wanna say thanks !!