This is going to be as basic as I can make it, but I'm going to try and improve people's understanding of how the ignition system works. Here we go. First of all, we have to understand what voltage and current is. Voltage is the potential. It's how much attraction it has. It's the measure of how enthusiastic it wants to get somewhere. Current is the bulk; the flow. It's the measure of how much you're going to get when it gets there. ex: A garden hose. Open the spigot and watch the flow coming out. It's not under much pressure (voltage), but it's got some good flow of water coming out (current). Increase the pressure by blocking the end off, and it shoots a longer distance, but the flow went down (higher voltage, lower current ) Switch to a fire truck. Mega pressure and volume (equivalent to a main power line when compared to the garden hose) Now that we have that figured out, where does the voltage come from? Well, it is fairly simple! Just don't try to understand the atomic level kinetics here and just believe that it works. It's called Faraday's Law. Essentially, when a wire passes by a magnet, it makes the wire produce a voltage. This is as simple as I can make it. Connect the wire to something, such as a light, and it will momentarily light the light because you have given the voltage a path, therefore it makes current FLOW. So how does this apply to my Chinese 2 stroke bicycle kit? There's a magnet on the left side of the engine, and it's actually attached to the crankshaft. That means it spins at engine speed. For every revolution of the engine, it makes one revolution. Every time the piston goes up, then down, it rotates one time. So we now have this spinning magnet... great. Well, turns out that they have a loop of wires packed all around that spinning magnet! Wait... wires? As in multiple? With an 's' at the end? Yes, more wires, all coiled together help make a stronger voltage! Sweet, so now what. It's spinning, it's making voltage... how does that equal sparky spark? ...stay tuned!