OK so I have an 87 KDX 200 that is driving me bonkers. I got it in trade and it was running, just not very well. The other day I rode for a few minutes and parked it, when I started it back up it ran for a minute and died. After kicking it like crazy for about ten minutes it fired and smoked like crazy. At that time I noticed a bunch of smoke coming from between the jug and the head. Switched head gasket out today and it is still doing the exact same thing. I am at a total loss, it will fire and run for a minute then die, kick it like crazy and it will fire again and bog out. Any ideas and or suggestions would be greatly appreciated.