Hello i have a 2002 300ex. i recently replaced the piston rings on it and put it back together. After it was put together i rode it for about 3 hours and heard a big pop and then my bike wouldn't run. I tore it apart and noticed the bolts holding the cam to the sprocket snapped off. The old cam was junk so i bought a new oem one. My question is do i have to do anything when i put the new one in. Do i have to check anything or just drop it in and go?