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Before you do anything else take off the valve cover and check your valve timing gaps. Check your timing marks at top dead center. It should be trying to start now. The DC CDI is usually the larger one about 3" long according to You Tube videos. AC CDI should be small and light. The red wire to the 2 prong plug should have battery DC voltage (hot) when the key is turned on. The AC CDI only when it's cranking or running. Compare to your old one. I doubt it would spark if it was the wrong one. Check compression after you do the valves.
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