While trying to slip my pistons into cylinders i noticed my crankshaft. will only spin in one direction. Not sure if that is normal or not. Was wondering if that is normal and if not how do i rectify the problem would sure like to hear from other more experienced members. this is my first time to disassemble and rebuild a SOHC four. when i push down on the kickstart lever it will move in the normal direction but not the opposite.