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LB-1 Limiter Bushing Kit Instructions:

  • Your kit contains two precision machined bushings. One larger 10 degree bushing with a small flat area machined on two sides and the other smaller bushing is the 14 degree that is round and has no flats.
  • The 10 degree bushing will allow 10 degrees of mechanical advance and the 14 degree will allow 14 degrees of mechanical advance.
  • The slot tolerances of the MSD Distributors are inconsistent and it’s possible that either bushing may be tight and possibly cause a slight bind. The bushing does not rotate, simply use a file or sand paper to remove enough material off each side of the bushing to allow for smooth operation of the advance mechanism.
  • This sketch shows a simple exaggerated view of how to clearance the bushing if needed.