Hey everyone. I just rebuilt my 71 CB450. I went to time the points and noticed the crankshaft won't spin clockwise at all. It moves counterclockwise perfectly but when I move it in the opposite direction the crankshaft doesn't budge. I took the top end back apart and didn't notice anything unusual. The crankshaft still won't spin in that same direction with the top end removed. It spun both ways before I took it apart so I am under the impression it is supposed to be able to move in both directions. Any ideas as to what I should be looking for?