I have a 05 450 with 60 hours on it and just replaced the cam chain with tensioner last weekend and installed a Dr. D 6oz flywheel and checked the valves and put a new spark plug in. After I reassembled everything and tried to start the bike it wouldn't start so I pulled the cam covers off and rechecked the cam timing and the crank timing and noticed the intake cam was off about 1 tooth. I then retimed the intake cam (didn't touch the exhaust cam) and reassembled things only to have the same problem? Then I replaced the new plug with the old one and that still didn't work? I made sure that the plug had spark which it did, carb has fuel flow too. I forgot to recheck the intake valve clearences though? Could this be the problem?