Replace A Harley Battery

Harley-Davidson is a well-known American motorcycle manufacturer. Harley owners tend to take care of their bikes as if they were family. Unfortunately, all battery-powered vehicles will need a replacement battery eventually. Like all electrical devices, not all Harley-Davidson motorcycles use the same kind of battery to run. This makes it very important to pay attention when replacing a Harley-Davidson battery. Fortunately, Harley-Davidson makes it simple to replace the battery in a bike when the old one gives out.


1. Protect yourself with gloves and eye protection before beginning. This will protect you from the battery acid you will be dealing with.

2. Take a look at the battery you want to replace. Make a note of the brand and code number. Use this when searching for a new battery. Not all Harley motorcycles take the same battery. If you’re unsure, disconnect the positive (red) and negative (black) terminals from the battery posts using a wrench or Phillips-head (some batteries require different removal methods) and bring the battery with you to the store.

3. Remove any corrosion on the ends of the wires that connect to the battery. Corrosion causes problems with the flow of electricity. Any corrosion may be sanded down with steel wool.

4. Purchase the battery that matches your brand and code number. Depending on the type of battery you purchased, you may need to fill the battery yourself with an electrolyte solution. Some batteries are pre-filled. If yours is not, it will come with the chemical solution. To fill it, look for a plastic cap on top of the battery. Remove this cap. Push the bottle of clear or yellowish liquid onto the plastic post on the battery. Put the cap back on.

5. Charge the battery on a battery charger for 3 to 5 hours (based on what the instructions that came with the battery suggest).

6. Place the battery back onto it’s post. Use a wrench (or screwdriver, whichever is needed) and connect the positive cable (red) to the positive post (+) on the battery. Connect the negative cable (black) to the negative post (-) on the battery.