ALL BALLS Racing Swingarm Bearing and Seal Kits for Big Twin 28-1139 Contains Two Bearings to Rebuild One Swing Arm Made from 52100 bearing steel for improved performance and extended life. Teflon D coated washers in place of the thrust needle bearings which offer superior resistance to dirt, water and lack of lubrication which are all factors leading to premature failure. 00-06 Softail Models.