IH: Primary Drive & Clutch


Adjusting the Clutch Release

Here is a great thread on adjusting the clutch release on L71-later? It has some very good pictures included.
(Clutch Adjustment Thread from XLForum.net)


Clutch Diaphragm Spring - Pressure

1971-1985 Sportsters

Barnett Scorpion Clutch Kit 607-30-10871 1)

  • 2) Six 501-37-06022 springs equals 240 lbs. of spring pressure.
  • 3) Six 501-58-06018 springs equals 348 lbs. of spring pressure.
  • (6) Six 501-70-06112 springs equals 420 lbs. of spring pressure.

L1984-90 Sportster

Barnett Scorpion Clutch Kit 607-30-10084 4)

  • MT-33-6 - - - 396lbs (six springs)
  • MT-112-6 - - 420lbs (six springs)
  • MT-113-6 - - 480lbs (six springs)


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