DRIVE TRAIN SECTION RED PART NUMBERS INDICATE NEW PARTS 7-53 1 2 3 4 5 6 7 8 9 10 11 CONTENTS ELECTRICAL FRAME FRONT END CONTROL WHEEL ENGINE DRIVE TRAIN FUEL EXHAUST GENERAL REFERENCE Big Twin Clutch Plates 1998/2017 1990/1997 Late 1984/1989 1941/Early 1984 PERFORMANCE CLUTCH PLATE KITS FOR BIG TWIN • Features Carbon Carbonite® based friction material for a superior coefficient of friction while providing a higher temperature capacity. • The single sided friction design (as listed) provides Carbonite friction material on both the drive plates and the driven plates. Year Description Stack Rpls. HD # Part # Height 1941/Early 1984 Extra plate kit. Includes 6 double sided drive plates (friction). 1.530” 37850-68 73120 & 5 driven plates (steel) 37975-81 Late 1984/1989 Single sided design. Includes 6 single sided drive plates,6 single .900” 37931-84 73121 sided driven plates & 1 double sided driven plate. 37975-84 1990/1997 Single sided design. Includes 9 single sided drive plates, 1.265” 37911-90 73122 1 double sided drive plate & 9 single sided driven plates. 37913-90 (Eliminates the riveted double steel driven plate) 1998/2017 Extra plate kit. Includes 10 double sided drive plates (friction) 1.875” 37932-98 73123 & 9 driven plates (steel). 37913-98 (Eliminates the damper spring & damper spring seat) LIFETIME WARRANTY Extra Capacity For High Torque Transfer
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