Pretty bike. You can buy black O rings at true value and there are colored ones ones on the 'bay. If your going to rehab that as a keeper I would suggest replacing the blocks/pads. The may look OK but 30+yo blocks can be dry and take more effort to get your stopped.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk