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Louie
Louie, Technician
Category: Motorcycle
Satisfied Customers: 11427
Experience:  25+ yrs. experience
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My girl friend has a 2003 Hyosung gl250 alpha sport and it

Customer Question

My girl friend has a 2003 Hyosung gl250 alpha sport and it keeps killing the battery. What might the problem be? I have been told by some that it is probably the voltage regulator but they also are not professional motorcycle mechanics. Any ideas will be greatly appreciated.
Submitted: 8 months ago.
Category: Motorcycle
Expert:  Louie replied 8 months ago.

Hi Steven and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially and if have not been tried; inspect the battery & ground lines and/or check/clean the battery cables + terminals, connectors and wiring as a preliminary consideration. Have the battery externally charged and then LOAD TESTed (even if new and just for the purpose of eliminating it as a suspect).

To confirm a charging issue, determine the battery voltage when:

  • ignition OFF - 12.7V is good;
  • and then when ON - 12.5 is good;
  • when starting the engine - 11.0V is good;
  • engine at idle - 12.9V is good;
  • when attempting to rev the engine - 14.5V is good.

Carefully test the output AC Voltage of the stator.

Customer: replied 8 months ago.
Thank you for your help, I will try what you suggested and hope that it cures her problem. Thanks again.
Steven
Expert:  Louie replied 8 months ago.

Great Steven!

Good luck and thank you too for the opportunity to be able to share the above information.