Motorcycles are built with the minimum necessary components to safely transport a person from one point to another. Since aerodynamics and bad weather are taken into consideration when designing a motorcycle, many accessories that can be found in a car or truck will not be present on a motorcycle. One of those missing accessories -- at least for non-touring motorcycles -- is a cigarette lighter outlet. To be able to plug in electronic devices -- such as a cellphone charger -- you may choose to add an outlet by wiring it directly to the battery.
Remove the battery cover panel from the motorcycle
Use the electrical pliers to cut a length of red electrical wire that will reach from the battery compartment to the point where you wish to attach the power outlet. Cut an equal-length segment of black electrical wire. Route the wires from the battery compartment along the motorcycle frame, and attach the wires to the frame using the cable ties. Leave approximately four inches of slack at each wire end.
Use the electrical pliers to strip off half an inch of insulating material from the battery end of the red wire. Crimp a spade terminal to the stripped end of this wire.
Strip off half an inch of insulation from the battery end of the black wire. Crimp the remaining spade terminal to the end of this wire.
Use the screwdriver to loosen (but not remove) the battery terminal retaining screws. Place the spade terminal attached to the black wire into the space between the negative battery cable and the negative battery terminal. Tighten the negative battery terminal screw until it holds the spade terminal snugly.
Place the spade terminal attached to the red wire into the space between the positive battery cable and the positive battery terminal. Tighten the positive battery terminal screw until it holds the spade terminal snugly. Replace the battery compartment cover.
Place the red wire from the power outlet into the run channel (centre gap) on the first splice connector. Insert the red wire from the battery into the tap hole on the side of the splice connector until it stops. Crimp down the U-contact on the splice connector until it is flush with the top of the plastic connector. Close the top cover of the splice connector so that it latches.
Place the black wire from the power outlet into the run channel on the second splice connector. Insert the black wire from the battery into the splice connector tap hole until it stops. Crimp down the U-contact on the splice connector until it is flush with the top of the plastic connector. Close the top cover of the splice connector so that it latches. Fasten the power outlet to the frame using a cable tie.
Some motorcycles have the battery compartment under the seat. If this is the case for your motorcycle, you will also need a hex wrench to remove the seat.