Is there suppossed to be a spacer of some sort between the bearing and the bigger gear on the crank?? The diagram shows there is one but i dont seem to have one unless i misplaced it.. When i tighten the bolt down i cant even mover the crank at all. None of the gears are able to move. Am i just tightening the bolt to tight? Im not really tightening it that tight at all. I would image it needs to be atleast snug right?