1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Odd Lucas auto-advance...

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

  1. Bob Z.

    Bob Z.

    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?
  2. motoracer8


    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


    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

    Jul 25, 2010

Share This Page