kx250 2 stroke will not kick over. Last time it was running, it was in 5th gear and the motor just cut out and the back tire locked up. Afterwards trying to kick it over it just made a really weird almost scratching like noise, I don't know its kind of hard to explain. Then you couldn't kick it at all it was rock solid. Now its freed up but still won't run. Have asked quite a few people and no one has any idea whats wrong with. The bike is in pieces right now, its been completely taken apart. Checked the spark plug and put a new one in, checked and cleaned the carb, checked the pistons and rings, ordered a new gasket because it got wrecked when taking it apart. checked out the motor and everything looks fine. Completely confused no clue what the problem is. I'm hoping maybe someone might be able to help. Thanks!!