Make your YZF start better
If you are fouling plugs, or have trouble starting your YZF then this mod is for you! This mod works on 98-02 YZ/WR250f, YZ/WR400f, and the YZ/WR426
To do this mod all you need to do is remove the light blue wire from the CDI. This light blue wire goes to the neutral switch and is causing low voltage output out of the cdi when it neutral. So when you disconnect the wire you get more voltage in neutral and more spark=easier starting.
It takes some wiggling around to get the wire out (WD-40 and compressed air helped loosen all the dirt and made it easier to remove) You DONT cut the wire you simply unhook it. Make sure you wrap electrical tape around the wire (in case you ever want to plug it back in)
Now go amaze your 2 stroke buddies and fellow YZF owners by how easy your bike starts w/o fouling plugs.
Before the light blue wire was disconnected
After the light blue wire is disconnected
All put back together
Here is a link to this topic on Thumpertalk.com CLICK HERE