All Balls Racing – Swing Arm Bearing Kits, including kits for the 01-03 KTM JR ADV 50, the 04-23 Honda CRF50F, the 14-17 Honda CRF250R, the 19-23 Beta RR 2T 125 and the 06-14 Yamaha WR250F. Each kit carries the bearings or bushings, inner sleeves, seals and thrust washers for one swingarm pivot, sized to the factory bore so nothing needs to be reamed or shimmed during assembly. The swingarm pivot is the single joint the entire rear suspension rotates around, and when it goes dry or notchy the shock cannot do its job. You feel it as a rear end that steps out in ruts, a chain that tightens unevenly, and a bike that refuses to hold a line under acceleration even after you chase the clickers. Fresh swing arm bearings restore free rotation so the shock reacts to small hits, keep the rear wheel square to the frame, and stop the pivot bolt from wearing an oval into the cases. Grease the sleeves well on assembly and re-check pivot bolt torque after a few rides. Kits differ between pivot bearing and bushing designs, so send us the year and model and we will confirm the correct swing arm bearing kit before you order.