What's up guys, I've been looking on the forums for a few days for answers to the problems I am having with my bike. I came down to it being the headgasket. As well as got other very useful important information. So the bike is a new, to me, 09 kx250f. So the day I got it I was riding around my woods, fairly hard, and I blew the head gasket. So I tore the bike down and replaced the head gasket as well as the base cylinder gasket while I was at it. Replaced all o-rings in the process including the water pump ones, new spark plug as well as cleaned up the piston and head. Fresh tank of gas. I go to start the bike, it starts first few kicks. But I heard an extremely loud rattle, first thought was it was the motor, but obviously I checked everything else to be sure, unfortunatly it is the motor. So I figured it was the timing off a tooth or something. Checked timing, it was fine. Started the bike again. Really rough to start and it couldn't idle now. Still had the rattle, but I have to rev the bike for it stay on. So I just killed the bike and it's currently sitting. Any thoughts?