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Odd Lucas auto-advance...

Discussion in 'General Classic Motorcycle Discussion' started by Bob Z., Nov 21, 2013.

  1. Bob Z.

    Bob Z.

    Joined:
    Mar 30, 2012
    Going through some old parts I saw this auto advance plate marked with both 5 and 12 degrees advance slots.
    Any idea what it came from?
    [​IMG]
     
  2. motoracer8

    motoracer8

    Joined:
    Mar 2, 2009
    Some BSA singles used that type of advance, 12 deg was used for battery ignition, 5 deg was used for ET, or energy transfer ignition. No battery, the coil got AC right from the alternator, if everything was perfect sometimes it would work.
     
  3. chilly

    chilly

    Joined:
    Jan 12, 2013
    Triumph did one as well , i think it was on the energy transfer model 350 or 500 .
     
  4. Matt Spencer

    Matt Spencer

    Joined:
    Jul 25, 2010

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