i recently andded lights to my 89 kx500.they dont make lighting coil for 87 thru 89 kx500's,but here's what i did.i found 92 kx500 stator,stator plate, flywheel and CDI[5 wire CDI]on ebay[90 thru 2002 will work].all these parts bolt right on no modification needed.then i just purchased a 90 thru 2002 lighting coil from Baja designs.i was able to set my bike up for about $350 [that includes taillight and headlight].i have extra cdi ["92" has 5 Wires] i will sell if your interested.