Try to clean the rotating part off below the pointer. Come straight out from the straight part of the pointer. Can you see what number (or marking) is lined up with the straight part? That is the degrees the crank is at. Line it up where the straight mark is lined up with the line that is at what looks like "TD" (may look like "TO"). That is TDC. Now you want to adjust the chain at the cam spkt where those marks line up.

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Jim