Re: Wiring My Bike, no instructions to go by 47cc
From the motor, the blue goes to the green from the cdi and the black from the engine goes to the black from the cdi. The white from the engine, unless you are hooking the kill switch up should be capped so it doesn't short the engine. If you do attach the kill switch, the blue wire goes with the blue wires between the engine and the cdi, the yellow connects to the black wires. Most people don't connect the kill switch until the motor is running as it has been known to cause problems.
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