So I've been thinking about adding a neutral light to my bike for quite some time now. I had looked at the schematics and knew it was possible, so I finally got off my butt and did it.
The following is my write-up on doing this. My bike is a 2012 WR450, but I think they are all very similar and as long as you have a neutral switch on your bike it can be done.
I started by removing the front headlight. I knew I wanted it mounted somewhere around the mph display and was delighted to find this.
That small hole on the right side of the bracket will be perfect for mounting the LED. I then removed the plug connector near it to give me room to cut.
I got out my Dremel and made a slice so that I could then bend up the bracket.
Here it is bent up into position.
I then mounted the LED into the bracket. I got this LED from a local electronics shop. It is a blue 12vdc LED with an 8mm body and will work great for this application.
Then added heatshrink to the individual wires
and to the whole thing
The trick here is to find a 12vdc source that is switched so your light does not stay on even when the bike is off. After poking around a bit, I found a spare plug that was hanging from the double bracket you see in the background.
After measuring, I found that 2 of the 4 pins were switched and gave me 11vdc. I made a quick test to see if there were any problems using this source. Everything worked great and I was able to run a small drill bit through the rubber plug on the connector so that it is sealed.
I am fortunate that I work with electrical and electronic equipment every day, so I had a crimp on connector that I could terminate the wire with and fit it within the plug itself. I guess I forgot to take a picture of that before I buttoned it all up, but you get the idea.
I then got under the gas tank and found this plug.
As you can see, I have already removed the diode from the plug and removed the spade connector from the body of the connector. I ran my other wire from the LED to this plug and soldered it to the light blue (schematics call it Sky blue). To get this out of the connector, you have to use a very small screwdriver or pick to push the tab down on it to get it out of the connector housing.
Once that is all done, redress all your wires to their proper locations and reassemble everything. Here is the finished result.
What do you think?