battery isn't charging

[joshscustoms]

I have a 1982 cbk and the battery isn't charging. The batt is new and it holds a charge.  someone told me to check the stator,  I have a circuit tester.  what do I need to do to isolate the cause of this problem?

[samdsalk]

I am having the same issue.  Did you figure it out?  I got a new battery but i think it might be the rotor.  Any help would be great.
Thanks,
Sam

[bear69]

First step is to make sure about the charging.

With your voltmeter set to 0-20v measure the voltage across the battery while everything switched off. It should be between 12 -12.8v. (2.1v per cell)

Then with the engine running measure again and it should read approximately 14v - 16v. If there is no significant increase then you are not charging.

Check all wiring and connections from regulator.

There are more tests for the regulator and stator but I dont have these to hand at the moment.