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sei 900. ignition advance

  1. Classics
    Hi - I finally got my '82 Sei 900 running. Set up a degree wheel to check the ignition timing and found that the cylinders 1 & 6 do not advance when revved-up. The 2-5 cylinders advance about 18 deg and the 3-4 cylinders advance about 20 deg. Any suggestions on what to do about 106? Thanks...