I have a tachometer from a 1983 honda 750 shadow motorcycle. I have tried connecting it to a 2006 Kawasaki Vulcan 900 motorcycle engine. The problem is that although both engines are 4 cycle/stroke the honda uses a dual fire ignition system ( spark plug fires on both compression/power stroke and exhaust stroke. The Kawasaki is designed to fire on the power stroke only. No surprise that when connected to the negative side of the kawasaki coil the Honda tach. registered only 1/2 the actual RPM's. I went online and found a electrical diagram designed to correct this, it didn't work. The diagram showed a wire coming from the negative side of each Kawasaki coil. Each wire passing through a 1N4007 diode (Radio Shack) and, also, a 100K Ohm resistor then connecting together and continuing to the tachometer. Tachometer will not work at all with the described wiring adaptor connected to both coils, disconnect from one of the coils and again I get a reading but only 1/2 of actual rpm, Any suggestions as how to fix my peoblem? Thanks.
Connect honda Tachometer to a Kawasaki motorcycle engine?
- Thread starter luther
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