I have been kicking around an idea for a home made light coil for a while, So I thought I would talk about It. My idea Is this, I want to get a new stator from a different bike that fits Inside the kx500 flywheel one of the ones with all the poles that looks like a radial airplane engine, a radial coil you could call It. You would need one that has the spark trigger built Into it and the coil that runs the cdi would have to put out the right amount of electricity but you could have It custom wound to the right values.You would have to custom make your own stator plate to bolt It to the engine but that would be easy. This is a picture of a kawasaki majave coil It Is for example only Im not saying It will fit, this one Is from rickystator.com and It puts out 100 watts of lighting power and It still has some empty poles on it.I hadThe one in my crf450x rewound to put out 150 watts. That would be pretty sweet for something that fit under your stock flywheel and mag cover and didn't weigh five extra lbs the trick would be to find the right size coil you would need a good resource some one with a but load of stators that would let you go threw them all looking to see what fit your mag or just some dumb luck and you have one that fits the bill in a box of crap In the garage. Just a idea maybe It will inspire some one or maybe not.
P.S. who knows with some dumb luck that coil might work, It fits the bill If It was the exsact right size