Hey guys, I have a 08 yz450f. I just replaced the head gasket and valve cover gasket. ive read every forum about timing and done exactly what everyone has said to do. bike still will not start. ive got the TDC line matched up perfect and the dots at 3:00 and 9:00 lined up with the motor. still nothing. thought maybe I was 180 off but I wasn't. Ive tried just about everything I can and I cant kick start it, pull start it, or anything. any suggestions? this is my first Yamaha ive ever had and im Kind of starting to think it was a bad idea to get rid of my Honda. help me please!!!!!