How do you change the battery in a 2003 Honda motorcycle?

In most later Honda models the battery is located under the driver's seat. The first step is to remove this. The seat is usually fastened with two bolts, often of the Allen type, one on each side of the rear of the seat. Then the seat is pulled back a bit and it is loose. In some bikes the CDI ignition unit is on top of the battery, pull this aside so it does not hinder access to the battery. Now you can remove the battery cables from their terminals. Disconnect the negative (black) cable first and then disconnect the positive (red) cable. Lift the old battery out and put the new battery in place. Be careful that the new battery turns the same way as the old battery, so the negative and positive cables will readily be connected to their respective terminals. Now, connect the positive cable and then the negative cable. Make sure the small bolts on the battery terminals are well fastened to the cables. Put the seat again in place and tighten the nuts on either side. Now you are ready to go.