How to add a Kill Switch to a Predator 212 Go-Kart/Minibike

Having a kill switch in the minibike handle or within arm’s length from the kart seat is so much more convenient than using the switch that comes with these Predator engines, especially if you have an electric start already installed!

It only costs about $8 and is super easy to install (won’t take you more than 5 minutes).

Step By Step (TL;DR Version) –

1. Buy a Kill switch with ring shaped ground plug.
2. Unhook the wire that connects the Oil sensor to the ‘kill wire’
3. (Optional) Remove the Kill switch that is in the Engine’s side cover
4. Connect the new kill switch’s plug to the kill wire
5. Hook the new kill switch to the place of your liking

Kill Switch

You’ll need a kill switch that has a rounded plug as ground so that it is easier to bolt it to the gas tank bolt or any other bolt in the engine’s body. You can find these types of kill switches on amazon or eBay.

Understanding the Wiring

All these wires might seem confusing but it really isn’t.

The main character is the ‘kill wire’, its function is to discharge the primary coil when the Kill switch is in the ‘off’ position or when the oil sensor detects low oil.

When the primary coil is discharged, the spark plug stops producing the spark, which stops the engine from working.

The ‘kill wire’ runs from the ignition coil (inside the engine) to the green plug/connector (as can be seen in the image above).

From that green plug, you will find 2 more black wires going out. One to the kill switch and another to the oil sensor.

The kill switch then has another yellow wire that is grounded into the engine’s body with a bolt, when the plug is turned to the ‘off’ position, it will actually complete the circuit and the current will run from the primary coil out to the engine’s body via the kill switch wires, which will stop the engine from producing a spark.

The same thing happens with the oil sensor, but it has a more complicated system.

1. Disconnecting the Oil Sensor

The easiest way to install a new kill switch is to disconnect the oil sensor and place the new kill switch in its place.

As you can spot in the above image, a black wire runs from a silver box into the green plug. It will easily come out when pulled.

After you pull the plug, cut the yellow wire, unbolt the silver box and take out all the wires.

2. (Optional) Take Out the Kill Switch that comes with the Engine

Now, this is not necessary, but you can take out the original kill switch that is attached to the side cover of the engine.

You will need a flathead screwdriver, apply some force in the opposite direction to the switch and it should pop out.

Remove the yellow wire that goes to the ground (engine’s body) from the kill switch and disconnect the black wire that connects to the ‘kill wire’ (it will disconnect from the black connector).

If you choose to leave the original kill switch on the engine, make sure that the yellow wire is still grounded and the switch is in the ‘On” position when you start.

3. Connect the new Kill Switch

The ring-shaped plug will need to be bolted into somewhere in the engine’s body, you bolt it with the gas tank bolt or if you’ve removed the OG switch, then you can ground it in the same place the original switch was grounded.

4. Attach the switch to the place of your liking

That’s about it. Just take the new switch to wherever you like, it might be the bike’s handle or near your kart’s seat.

The switch will likely have 2 screws, remove them and screw them back.