How to Troubleshoot an Electrical Problem in a Kawasaki 750 Vulcan

Written by brianna byrne
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How to Troubleshoot an Electrical Problem in a Kawasaki 750 Vulcan
A stiff wire-bristle brush can help Vulcan 750 owners clean battery terminals necessary for a working electrical system. (drahtbürste image by Frank-Peter Funke from

One of Kawasaki's most prominent lines of cruising motorcycles, the Vulcan make has been around since the 1980s, with the 750-cubic-centimetre Vulcan released as one of the first models in 1986. Though Kawasaki discontinued this model in 2006, the company still offers owner's manuals and servicing information for this long-lasting bike on its website as of 2011. In the Vulcan 750's manual, owners can find specific troubleshooting information and minor repair tips regarding the cycle's electrical system.

Skill level:

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Things you need

  • Standard wrench
  • Pliers
  • 30-amp fuse
  • Wire-bristle brush
  • Baking soda
  • Dry rag
  • 12-volt, 14-ampere-hour replacement battery
  • Separate 12-volt battery charger
  • Dielectric grease
  • Gloves
  • Goggles

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  1. 1

    Operate the electric starter. If the engine does not turn over, something has likely gone wrong with the electrical system.

  2. 2

    Check the engine stop switch, located on the right handlebar, and ensure that the switch is turned to the "RUN" position. Otherwise, the starter motor cannot operate.

  3. 3

    Check to ensure the clutch is pulled in and that the transmission is in neutral.

  4. 4

    Unscrew and remove the left cover of the Vulcan 750 to access the main fuse, located beneath the bike's seat, using a wrench. Carefully remove the fuse with a pair of pliers.

  5. 5

    Inspect the condition of the fuse. If the connection at the centre of the fuse is broken, it has blown. Replace it with a new 30-amp fuse, and reinstall the left-side cover.

  6. 6

    Try the electric starter once more. If the starter motor still will not engage, the electrical system is still faulty. Move on to the battery check.

  1. 1

    Unscrew and remove the Vulcan 750's seat to access the battery case and battery.

  2. 2

    Unscrew the battery holding plate mounting screw, and remove this plate.

  3. 3

    Disconnect the lead from the negative (-) terminal first and from the positive (+) terminal second.

  4. 4

    Lift the battery carefully from its case.

  5. 5

    Inspect the battery terminals. Scrape away any corrosion using a wire-bristle brush.

  6. 6

    Clean any build-up or debris from the battery terminals using a solution of 1 tbsp of baking soda and 1 cup of water. Dry the terminals thoroughly with a clean rag.

  7. 7

    Replace the battery with a new 12-volt, 14-ampere-hour battery if the original is heavily corroded or otherwise damaged.

  8. 8

    Charge the battery fully using a separately powered 12-volt battery charger.

  9. 9

    Return the battery to its case, this time connecting the lead to the positive (+) terminal first and the negative (-) terminal second.

  10. 10

    Coat the battery terminals with a thin layer of dielectric grease. Reinstall the battery holding plate and Vulcan 750 seat.

  11. 11

    Operate the electric starter. Take the motorcycle to the shop for further inspection if the starter motor and electrical system still will not work.

Tips and warnings

  • If troubleshooting on the electrical system fails, your Vulcan may require more serious repairs. Kawasaki refers owners to a certified dealer in these instances.
  • Batteries may release explosive fumes or battery acid. Avoid smoking and open flames and wear gloves and goggles while troubleshooting the battery to avoid injury.

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