Wiring a motorcycle radio and speaker system is easier than you think. First, you need to make sure that you have properly mounted the radio/amplifier and the speakers using the provided hardware. You then need to connect the radio to the positive circuit bus which is located on the console by using the red power wire.
You then need to connect the black wire to the negative circuit bus. You’ll also need to connect the speakers to the power socket and then the yellow wire to the speaker input which is located on the amplifier.