I apologize to everyone if these questions have been asked a gazillion times in the past. I swear that I did a search, but I'm still confused. I'm new to this whole thing, and I keep confusing myself. I also downloaded and read the pdf instructions that someone put together here. I just wanted to double check my understanding before moving on. My bike is a 2001 WR426. The previous owner told me that he set it up with the YZ timing. First, here are pics of my stock cams after I pulled the cover off. All my questions reference these pics: Here are my questions: 1. Can you tell if I'm at TDC based on this pic? The manual says to align the line with the notches in the hole, but the line in the manual looks different than the actual line. When I look in the hole, I see 'HI' inside. I lined the 'I' with the notch. I'm assuming that's TDC, but I'm not sure. 2. Does the YZ timing mean that the stock exhaust cam was rotated a couple links so that there are only 12 links between the marks on the cam gears? 3. I read that the WR timing should be 14 links between marks. Is this true? 4. I bought the 03 YZ450 autodecompression cam. Is that different than the 03 WR450 cam? 5. Should I install the new cam the same as the existing cam (12 links between dots), or should I put in 14 links in between? 6. What are the clearances supposed to be with the cam rotated like this? Is it the same as stock? (0.10 - 0.15 mm) I appreciate any answers that y'all can give me.