PLEASE NOTE: Delays in processing orders. Orders placed between Thursday 22 January and Monday 09 February will be processed 10 February.
Lucas Magneto auto advance springs, pair, suit Lucas magnetos on Norton Triumph, BSA, AJS etc. Outer diameter 3/16", eye on each end, 3/4" between centres; Overall length: 0.815" (20.72mm); Diameter 0.186" (4.72mm) Original part number: 498157 - auto advance unit spring set