How do you have the wires hooked up for the tachometer function? I had to wrap it around the coil about 7-8 times before I could get a stable reading. Hooking it in directly to the coil wire spade didn't work for me at all - had to wrap it around the wire.
I'm using the purple CDI on mine.
Does it sound like your engine is revving up higher than 4500 RPMs? That is a really low number. When mine's running around 8k you can tell the engine is revving.
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- Mike
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