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Bike not charging my battery

Discussion in 'XJ Technical Chat' started by louis, Nov 3, 2008.

  1. louis

    louis New Member

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    :x I have a 1981 XJ750 Sica. My bike wont charge my battery, I have changed my voltage regulator and no luck I even change my brushes on the alternator, I checked the field coil resistance, armature resistance, I even checked my voltage regulator for continuity, I even checked all my fuses and all seems fine, but it is still not charging the battery and since I changed the voltage regulator the bike should to a self test but all my guages exsample head light, tail light, oil, petrol, brake, all stay on and dont go off. Please help
     
    louis, Nov 3, 2008
    #1
  2. bill

    bill Active Member

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    Two thoughts

    Is the battery bad? Take it to an auto parts store and have it tested. It may not take a charge. Check the fluid levels while you're at it. Friend of mine bought a brand new battery that wouldn't take a charge so you never know.

    Have you checked the voltage at the battery at above 2000 RPM? Should be in the 14 V range. If it's not start working backwards to see if you have a bad connection.
     
    bill, Nov 3, 2008
    #2
  3. louis

    louis New Member

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    I have put in a new battery and when I reve it to 2000 rpm it only give me 12.5 v
     
    louis, Nov 3, 2008
    #3
  4. switch263

    switch263 Member

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    sounds like potentially a bad ground, if the generator parts are new. Bad ground can cause low voltage across the board.
     
    switch263, Nov 3, 2008
    #4

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