Hi im new to this its my first post. I have a 2011 yz450f, i went to set the valves the other day because the bike backfired and died and wont start back up. when i took the valve cover off it seemed the timing marks would not line up. i also noticed that they have changed the timing marks on the fly wheel from the 2008. So i did the valve adjustment but cant get the mark on the flywheel to match the marks on the cams,am i doing somthing wrong? has anyone had this problem on the new style motor? the book only shows one timing mark so im going with the most obvious one. Ive been working on it all weekend trying to get it lined up and either way its too far out with both cams lined up even on the head. Please help if anyone has any info it would be much appreciated!