Add a Tachometer

[5th_bike]

Originally Posted by wacio

BTW: My voltage shows 10.8 volts and it is actually correct. Investigating why I have such voltage drop in the front light where I attached the meter. it is 12.3 on the battery.

The voltage drop is simply from the wire resistance, your headlight draws several amperes so part of the battery voltage gets lost as heat in the wiring. To get a better reading, connect the wires closer to the battery, or on a circuit that doesn't draw much current. At the horn, the voltage only drops a bit when you honk. The yellow wire at the horn is 12V, I connected the +12V (red) wire of my tach there.