DuctTapedGoat
Active Member
This is proper wiring of a stock motor. The instruction manual, well, it lies to you. Disregard what your manual says about the wiring pattern. The purpose of this guide is to help other people who have dealt with the same problem I did when I was on my first build, which was that my kill switch did not work. It seemed to TRY to work, but it just reduced the power of the engine. This is the fix for that issue. I will explain why at the bottom of the post.
:::::WIRING GUIDE :::::
Okay, first we will take note of our wires.
NOTE: Different brands tend to use different colors for some wires, so use the process of elimination to determine what color a wire is if it is not stated here.
*Kill Switch Wires : Black Wire & Red/Yellow Wire.
*Engine Wires : Green/Blue Wire & Black Wire & White Wire.
*CDI Wires: Green/Blue Wire & Black Wire.
*Other Stuff: Wire Cap & Ground (Two most common spots are the water bottle screw after removing all contact paint, the bracket below the CDI and grounding to a CDI screw after sanding paint off the frame where bracket comes in contact with the frame.)
Now that you know what wires you have, it's time to connect them.
1. Engine's Green/Blue Wire to CDI's Green/Blue Wire.
2. Engine's Black Wire to CDI's Black Wire.
3. Kill Switch's Black Wire to Engine's & CDI's Green/Blue Wire.
4. Kill Switch's Red/Yellow Wire to Ground.
5. Engine's White Wire to Wire Cap.
Go ahead and fire up your bike real quick so you can test your brand new fully functional kill switch!
I don't know why the instruction manuals tell you to connect the white wire from the engine into the circuit. That's the ~7V live wire intended to be used by extra bike devices, like lights and such and such. When that white wire is in the circuit, the kill switch will not be able to stop the motor.
:::::WIRING GUIDE :::::
Okay, first we will take note of our wires.
NOTE: Different brands tend to use different colors for some wires, so use the process of elimination to determine what color a wire is if it is not stated here.
*Kill Switch Wires : Black Wire & Red/Yellow Wire.
*Engine Wires : Green/Blue Wire & Black Wire & White Wire.
*CDI Wires: Green/Blue Wire & Black Wire.
*Other Stuff: Wire Cap & Ground (Two most common spots are the water bottle screw after removing all contact paint, the bracket below the CDI and grounding to a CDI screw after sanding paint off the frame where bracket comes in contact with the frame.)
Now that you know what wires you have, it's time to connect them.
1. Engine's Green/Blue Wire to CDI's Green/Blue Wire.
2. Engine's Black Wire to CDI's Black Wire.
3. Kill Switch's Black Wire to Engine's & CDI's Green/Blue Wire.
4. Kill Switch's Red/Yellow Wire to Ground.
5. Engine's White Wire to Wire Cap.
Go ahead and fire up your bike real quick so you can test your brand new fully functional kill switch!
I don't know why the instruction manuals tell you to connect the white wire from the engine into the circuit. That's the ~7V live wire intended to be used by extra bike devices, like lights and such and such. When that white wire is in the circuit, the kill switch will not be able to stop the motor.