This one proves to be a toughy. I just bought a Z50 that has seen better days. I'm going through the whole motor, but the thing that is stumping me at the moment is the rocker pin that has been installed backwards. Therefore, I don't have access to the female threads to pull the pins out. Because of the condition of the motor overall (it looks like water got into the oil), no amount of skillful shaking is going to work this pin out. I can't be the first to have this issue. Any and all help appreciated.