those pics are from my wr426f. they look a little off in the pic but when i wiggled the rotor a little one way they looked lined up about right to me. the bike ran well as well. i pulled the cam caps and took the nut off the flywheel but im waiting on my puller to come to get off the flywheel. when i time the bike to the yz timing will the exhaust cams marks no loger line up with the head? on this site it says there should be 12pins for the yz timming and 13 for wr timing like mine had above. http://www.thumperfaq.com/yz_timing.htm The site you just linked to is for a YZ250F, not a YZ426. http://motoman393.thumpertalk.com/tech/yztime.html DO NOT attempt this with an engine using auto decompression.