How to connect a motorcycle DC igniter?
2 Answers
There are a total of two wires that need to be connected for the igniter, while the others can simply be plugged in. The details are as follows: 1. Function of the wires: Connect the blue wire to the neutral line, and the red/white wire to the relay of the live wire. The remaining wires can be plugged in directly. The DC igniter does not require connection; it can be used by simply plugging it in. For the engine's five wires: the black wire is the stator ignition coil of the magneto, which connects to the two-pin socket of the igniter. The blue/white and green/white wires are the stator trigger coils, which connect to the four-pin socket of the igniter. The red (likely pink) and yellow wires are the lighting coils, which connect to the rectifier. 2. Two sets of plugs: For the igniter's two sets of plugs, the one with two wires—one connects to the magneto ignition coil (i.e., the black/red wire), and the other connects to the kill switch wire of the ignition switch, usually a black/white wire, which grounds to the frame. When the key is turned off, it connects to the black/red wire to short-circuit and kill the engine. For the four-pin plug end, apart from the two wires connecting to the magneto trigger coils (blue/white and green/white), one connects to the high-voltage coil (usually a black/yellow wire), and the other is the ground wire, usually green.
Last time I helped my younger brother convert his 125cc motorcycle to a DC ignition system, I remember there were mainly four wires to connect: the red wire goes to the positive terminal from the ignition switch—make sure to wrap it well with insulating tape to prevent grounding. The black wire should be grounded to the motorcycle frame, and remember to scrape off the paint layer to ensure good conductivity. The blue-white wire connects to the trigger terminal of the ignition coil, and the yellow wire connects to the pulse signal wire from the magneto. After installation, the most crucial step is to measure the static current—use a multimeter connected in series behind the ignition switch and check if the current is below 0.02 amps. If the current is too high, it can secretly drain the battery. Oh, and if the screw holes don’t align, never force them—using rubber gaskets as buffers is much safer.
