Installing a handle bar Kill Switch

 Most of the Honda clones come with same wiring, a fan shroud mounted kill switch that is wired to the coil, a ground and the oil sending unit.

When installing a handlebar mounted kill switch there are a couple of ways to wire it. The ring terminal (in the picture below the wire is green, but it also might be black) goes to the ground, you can use the same ground the factory mounted switch uses. The main wire (in the picture below is black but might also be red) goes to the existing switch.

The factory provides a quick disconnect connection that you can plug your switch into (see below), but when you unplug the black wire (the one going to the silver box), you disable the low oil sending unit, now this is not a big deal if you are good about checking your oil, but if you want it to work, you need to unplug the black wire (shown below) and wire up a new male connector that has both the black wire coming from the oil sending unit and your black (or red) wire coming from your handlebar switch. If you are not worried about the oil sending unit, just plug your black (or red) wire coming from your handlebar switch into the connector that has the yellow & black wires connected to it (see below).

Personally, I don't mind disabling the oil sending unit, we didn't have those in the 70's and we don't need them now, just make sure to check your oil level before every ride.