Suzuki Gn 125 Cdi Wiring Diagram Official

The Suzuki GN 125 is a legend in the world of small-displacement motorcycles. Known for its bulletproof reliability, fuel efficiency, and simple air-cooled single-cylinder engine, it has served as a commuter, a first bike, and even a popular café racer donor for decades. However, while the mechanical side of the GN 125 is robust, the electrical system—specifically the Capacitor Discharge Ignition (CDI)—can become a source of frustration as the bike ages.

While colors can vary slightly by manufacturing year or region, the standard Suzuki GN 125 wiring typically follows these patterns: : Ground/Negative terminal. : Power supply from the stator to the CDI. Blue/White : Trigger signal (pickup coil) from the stator to the CDI. Yellow/Black : Ignition pulse sent from the CDI to the ignition coil. Black/White : Connection to the engine stop (kill) switch. Suzuki Gn 125 Cdi Wiring Diagram

This piece converts Alternating Current (AC) from the stator into Direct Current (DC) to stabilize the system and charge the battery. The Suzuki GN 125 is a legend in

ground wire first. A loose ground is a common cause of ignition failure. Engine Won't Stop : Inspect the Black/White kill switch wire for breaks or poor connections. Protective Measures While colors can vary slightly by manufacturing year

Remember that the GN 125's systems are simple by design. With a $20 multimeter, the diagram above, and systematic testing, you can diagnose any CDI-related fault. Keep the wiring clean, the grounds tight, and the connectors greased, and that legendary single-cylinder will fire on the first kick every time.

If all these pass and there is still no spark, the CDI module itself is the likely culprit. While CDI failures are rare, they are not impossible—especially on aftermarket units.