If your diagram shows a wire labeled "B/Y" going from Pin #3 of the CDI to the ignition coil positive terminal, you need to verify continuity with a multimeter.
However, the Honda Unicorn is unique. It does not use a universal "AC-CDI" or "DC-CDI" box found on generic Chinese scooters. Honda uses a specific ignition timing curve and wiring pinout for the Unicorn’s 150cc air-cooled engine. honda unicorn cdi wiring diagram pdf
The Honda Unicorn typically features a 5-pin or 6-pin CDI configuration. While specific colors can vary slightly by manufacturing year, Honda generally follows a standard color-coding scheme: Wire Color Connection Point Pickup Coil (Trigger) Sends timing signal from the engine's pulse generator Black / Yellow Ignition Coil Carries high-voltage signal to the HT coil Green Ground (Earth) Primary chassis/engine ground connection Black / White Kill Switch Grounds the CDI to stop the engine when the switch is OFF Black / Red Power Supply Supplies power from the stator (exciter coil) to the CDI Ignition System Components If your diagram shows a wire labeled "B/Y"