I haven't tried the rpm gauge yet. My Bike is buried under 3 feet of snow. I recall there being a wire under the dash for it, as all of the wires were screw terminals. I have installed a tach in my car before and one of the wires is for the signal. I believe it can plug into the analog port, but may need some resistors. I would put a multimeter on it first to see what comes off of it. If someone could take a pic underneath showing all of the screws, that would be handy too.
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