I replaced my plugs and wires when I installed the Stage 1 - mostly because the instructions said to. I had my dream cruiser 1 for almost three years and 33K miles with the stock wires and plugs and never had any problems with them. It was due for its 30K and I planned on doing it then, but got the GT 'vert instead.
So ... in answer to your original question, goldpt, unless you are experiencing problems, I don't see why you would want to replace your plugs and wires.
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