Tore into my 200x I bought recently to put a xr200 cam into it. I have the motor on top dead center, the valve tappets are super loose and the cam chain sprocket is removed but the camshaft will not pull out from the head. Does it mean my cam journals are shot? There any fix for that or does it mean a new head? Followed everything in the manual so I'm assuming the cam not coming out freely is a bad sign.