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Old 12-16-2020, 05:34 PM   #8
nkaminar
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Join Date: Jan 2012
Location: Western North Carolina
Posts: 3,897
Default Re: French Model A aluminum head

My old single cylinder BSA motorcycle had dual plugs. It was modified. The coil had two ends. Instead of grounding one end of the secondary, it was lead to a second high voltage connection. One end of the coil when to one plug and the other end went to the other plug. They both fired at the same time.
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