OK, here's my horror story.... I bought a '00 yz426 from my brother, who was the second owner of this bike. He didn't ride it very much, and did not have a clue about maintaining it. It runs well, but knowing my bro, I had to tear into it and make sure the valves were in spec. I get in there and find that they all need shims, and start taking the cams out when I find that all of the cam cap bolts are WAY over torqued!!!! I knew I was in trouble..... and sure enough the cams and caps are scored, and the journals were shroomed so I couldn't get the buckets out. After hours of scraping aluminum with a screwdriver they finally came out. I shimmed them and put the buckets back in, then took a Dremel with a stone attachment and smoothed out all the damage that I did to get the buckets out. I figured I'd just put it back together and run it, since it needs a complete head and cams anyway what's it gonna hurt It runs, but I need to find a head for it and buy a set of Hotcams. Anyone know where I could find a used one?