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887 CLUTCH COMPONENTS 51-BP1 51-SR4 51-HDP9K 51-HDP5M 51-HDP4B 51-HDP6 51-SK5 51-SK4 Model/Year Part No. Features Description Sportster 51-SK1 Friction Plate Kit. Consists of 7 friction plates bonded to steel cores. (H.D. No. 37985-52AO) Thru 1970 51-SK1EPK Kevlar Extra Plate Clutch Kit. Consists of eight Kevlar friction plates, one steel driven plate and a set of heavy-duty clutch springs. Adds approximately 14% more clutch surface area. 51-SK4 Sintered Friction Plates. These race-proven plates are for the serious racer. The plates are made of sintered-iron fused to high tensile strength cores. Resistant to wear and high temperatures. They are designed to be run dry, but if they become contaminated with oil, they can be easily cleaned and reused. Normally used as a slipper clutch. .140" Thickness. 51-SK5 Drive Plate. Replaces H.D. #37992-52. Made of steel, .047" thickness, key-hole slots 51-SK511 .119" thick Extra-Thick Drive Plates. Made of heavy gauge steel for use in racing machines (primarily drag bikes) in 51-SK513 .089" thick conjunction with our 51-SK4 / Barnett 301-30-70004 sintered-iron friction plates. 51-SK514 .078" thick Thicker plates help reduce warpage problems and also build up stack height as friction plates wear 51-SK516 .059" thick 51-SK7 Sportster Backing Plate. Fits models thru 1970. Made of heavy gauge steel. Replaces H.D. No. 38016-57. 17-MT52 Clutch Springs - Replacement (Set of 6), 40 lbs @ 1" 17-MT536 Clutch Springs - Heavy Duty (Set of 6), 50 lbs @ 1" Sportster 51-SK3K Kevlar Friction Plate Kit. Comes with 8 friction plates and spacers. We also recommend use of our 51-SK6 / 1971 Thru 1985 Barnett 401-30-047060 drive plates. Run as a wet clutch. 51-SK3CF Carbon Fiber Friction Plate Kit. Comes with 8 friction plates and spacers. We also recommend use of our 51-SK6 / Barnett 401-30-047060 drive plates. Run as a wet clutch. 51-SK8 Outer Drive Plate. Fits 1971 thru '85 models. Alloy friction plate, bonded on one side only. (H.D. No. 37987-71) 51-SK6 Sportster Drive Plate. Made of tough steel. (H.D. No. 37992-71) 51-SK3S Stock 1.525" Clutch Spacers. Used to assist in adjusting the pressure plate (releasing disc). They come in a set of six. Sporster/Evo 51-SK9K Kevlar Clutch Plate Kit. Consists of 7 bonded friction plates. Fits 1986 to 1990 883, 1100 and 1200 models. (H.D. #36788-84) 1986 Thru ‘90 51-SK9CF Carbon Fiber Clutch Plate Kit. Consists of 7 bonded friction plates. Fits 1986 to 1990 883, 1100 and 1200 models. (H.D. #36788-84) 51-SK10 Steel Drive Plates. Fits 1986 to 1990 883, 1100 and 1200 models. (H.D. #37678-84) 51-SK9EP2 Extra Plate Clutch Kit. Fits Evo Sportster models. Consists of 9 friction disc and 8 steel drive plates. Adds 28% more surface to clutch. Very smooth, positive action. A must for performance engines. (Double steel not used with this kit.) 51-MT78 Heavy Duty (1) 20% stronger than stock. 51-SK14A Complete Clutch Kit. Consists of 7 frictions, 5 steel plates, and 1 spring. Sportster 51-HDP16 Clutch Plate Kit. Consists of 8 frictions and 6 steel plates. 1991 & later 51-HDP11K Kevlar Friction Plate Kit. This kit consists of eight bonded friction plates. Replaces H.D. Nos. 37910-90 and 37911-90 Buell friction plates. 1991-02 51-HDP11CF Carbon Fiber Friction Plate Kit. This kit consists of eight bonded friction plates. Replaces H.D. Nos. 37910-90 and 37911-90 friction plates. 51-HDP12 Steel Drive Plates. 6 required. (NOTE: You must re-use stock double, riveted drive plate). 51-HDP11EPK Kevlar Extra Plate Clutch Kit. Consists of nine friction plates and eight steel drive plates. Adds 12% more surface area to clutch pack. (Note: Double steel drive plate not used with this kit.) 51-HDP11EPCF Carbon Fiber Extra Plate Clutch Kit. Consists of nine friction plates and eight steel drive plates. Adds 12% more surface area to clutch pack. (Note: Double steel drive plate not used with this kit.) 51-MT77 Heavy Duty Clutch Spring -25% stronger than stock, race applications, only. 51-MT81 Replacement Clutch Spring 51-BP1 Billet aluminum pressure plate XR1200 51-38500 Clutch Plate Kit. Consists of 8 frictions and 7 steel plates. 2009-13 Harley 45 51-HDP7 Consists of two full plates and one half plate. Made of steel alloy and bonded with our exclusive oil resistant friction material. 51-MT41 Clutch Springs- Replacement (Set of 10) Big Twins 51-HDP5M Wet/Dry Friction Plate Kit. Finally, a single clutch kit for all application, wet or dry. All Big Twins from 1941-E84. Consist of 5 1941 thru Early 1984 friction plates made on a steel core, using our exclusive "molded" Carbon Fiber Friction Compound. It will handle all your clutch needs, whether youíre running an open belt drive, sealed primary or conventional set-up. Resist "Glazing" which causes chatter/noisy engagement. Tolerates extreme heat, suitable for all High Performance applications. The porosity of the compounds adapts it perfectly to wet applications. For a smooth, positive, no slip clutch action. 51-HDP5EPK Kevlar Extra Plate Clutch Kit. Consists of six friction plates, one steel plate and a set of heavy-duty clutch springs. On pre-1968 models, an extra steel drive plate is required (either stock or our 51-HDP6 / Barnett 401-30-119006). This kit adds approximately 20% more clutch surface area. 51-HDP089 Sintered Iron Friction Plate. For racing applications only. 160" Thick, 6 required per clutch pack. 51-HDP4B Clutch Hub Liner/Backing Plate. Comes complete with necessary rivets for mounting to clutch hub. 51-HDP6 Steel Drive Plates. Same as H. D. No. 37975-41. Sold individually. Models thru 1967 require three plates. 1968 and later models require four plates. 51-MT41 Clutch Springs - 1941-67, Replacement. 50 lbs @ 1 1/8" (Set of 10) (Orange) 51-MT68 Clutch Springs - 1968-83, Replacement. 40 lbs @ 1 1/8" (Set of 10) (Blue) 51-MT69 Clutch Springs - 1941-83, Heavy Duty. 68 lbs @ 1 1/8" (Set of 10) (Grey)


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