How to Replace the Battery in a Harley Ultra Classic

The Ultra Classic's starting system is operated by a powerful 12-volt motorcycle battery.

Harley-Davidson Ultra Classic motorcycles are air-cooled, all-aluminum, 45-degree V-twin bikes with classic looks and styling. Their starting system is operated by a powerful 12-volt motorcycle battery. Although there have been wonderful advances in battery technology of late, these batteries typically have a lifespan of 18 to 24 months. Changing them out on an Ultra Classic is straightforward and should take no longer than 20 to 30 minutes of your time.

Difficulty:

Easy

Instructions

Things You'll Need

• Phillips screwdriver
• 10mm open-ended wrench
• T-40 TORX drive head

1. Remove the Seat

   • 1

     Open the tour pack. Unscrew the seat fastener on the rear fender using a Phillips screwdriver.

   • 2

     Push the seat as far forward as possible while lifting the rear of the seat off the frame.

   • 3

     Pull the seat rearward when the back of the seat has cleared the tour pack. Lift the seat all of the way off the frame.

   Replace the Battery

   • 1

     Disconnect the negative terminal of the battery using a 10-mm open-end wrench. Perform the same task on the positive battery terminal.

   • 2

     Loosen the hold-down clamp of the battery using a T-40 TORX drive head.

   • 3

     Lift the battery free from the battery box.

   • 4

     Position a new 12-volt motorcycle battery in the battery box with the terminals facing forward toward the front of the motorcycle.

   • 5

     Insert and tighten the positive battery cable connection using a 10 mm open-end wrench. Perform the same task on the negative cable.

   • 6

     Position the battery hold-down clamp over the edge of the battery. Tighten the clamp bolt with a T-40 TORX drive head.

   • 7

     Reinstall the seat in reverse order.

Tips & Warnings

• Consider applying a coat of petroleum jelly to the outside of the battery terminals to help prevent corrosion.

• Recycle your used battery at your nearest auto supply store.

• Exercise caution when working around motorcycle batteries. Remove all watches and rings to prevent a burn.