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81 SX400H

Discussion in 'The Garage' started by Tomaximus, Nov 14, 2017 at 12:02 PM.

  1. Tomaximus

    Tomaximus XS400 New Member

    Is the headlight supposed to get brighter when the engine revs?
  2. A more or less normal symptom of the bike starting to charge at about 2000-3000 rpm. Annoying, but pretty much normal.
    Tomaximus likes this.
  3. xschris

    xschris miles of smiles =)

    Check the volts at the battery while it's running. You should have 14.5 at 5k rpm's and about 12.7 or so at idle.
    Tomaximus likes this.
  4. Tomaximus

    Tomaximus XS400 New Member

    I've got 12.8 at idle and 14.9 at 5000rpm.
  5. BBS360

    BBS360 XS400 Guru

    So your charging system is doing well.
    It's just how these bikes work.
    Going to an LED or HID headlight would give more light for less wattage consumed, and probably have a more consistent brightness through the RPM range.
    Tomaximus likes this.

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