Chuck,
While you are disassembling the 235, take pictures of how it was put together. Digital photography is cheap. You can photograph everything! and still have it fit on a $10 memory card. When you put it back together, it should look the same, only cleaner and not as worn. Anything the shop manual doesn't make clear, ask about it here. It's almost certain to be a previously solved problem, and somebody here can help.
I also recommend checking out Inliners.org -- there's some knowledge to be harvested there as well.
regards,
Leon
