How to refill a motorcycle battery

Written by c.l. rease
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to refill a motorcycle battery
A properly maintained battery keeps your motorcycle running reliably. (motorcycle image by Bionic Media from

Lead-acid, self-sealing and factory-sealed batteries are the three types used in motorcycles. Lead-acid batteries are the only type that needs water added to the battery to replenish its electrolyte levels. A lead-acid battery has caps covering the opening to each battery cell. If your motorcycle battery does not have top-mounted caps, you do not need to refill the battery. If you do need to refill your battery, the process is simple and straightforward.

Skill level:

Things you need

  • Baking soda
  • Disposable drinking cup
  • Distilled water
  • Flathead screwdriver
  • Battery cell filler

Show MoreHide


  1. 1

    Place two teaspoons of baking soda in a disposable drinking cup. Pour enough distilled water into the cup to form a paste with the consistency of glue.

  2. 2

    Remove the caps lining the top of the motorcycle battery by turning each cap counterclockwise with a flathead screwdriver. Set the caps aside. Do not touch the inside of the caps with your fingers.

  3. 3

    Check the fluid level of each battery cell. Replace the cap on each cell with a fluid level resting at the full line.

  4. 4

    Fill a battery cell filler with distilled water.

  5. 5

    Insert the end of the battery cell filler into one cell low on fluid. Fill the cell until the fluid sits on the full line. Fill each cell in the same way, adding distilled water to the battery cell filler as needed.

  6. 6

    Replace the caps on the remaining battery cells.

  7. 7

    Pour distilled water into the baking soda paste to thin it to a consistency of milk. Wash your tools, hands and area around the battery with the baking soda solution to neutralise any sulphuric acid that's outside the motorcycle battery.

Tips and warnings

  • Check the fluid level of your motorcycle battery once a month.
  • Wear proper protective equipment to avoid burns from the sulphuric acid of the battery cells.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.