Motorcycle Tach Wiring Diagram. Yamaha at2 125 electrical wiring diagram schematic 1972 here. I am not denying that.
A tachometer is a device that measures the rotation speed of the engine of your motorcycle and displays this information to you in an easy to read fashion. Negative or body or ground. There will be principal lines which are represented by l1 l2 l3 and so on.
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But it doesnt mean connection between the cables. Every motorcycle has a wiring system. Use 16 gauge or 18 gauge insulated copper wire. This is part 1 of 2 for this rpm ebay tacho.