QuadBoss 92-98 Yamaha YFB250 Timberwolf 2x4 Swingarm Repair KitEnsure your swingarm bearing assembly is properly rebuilt with this repair kit. Needle bearing shafts are made with 52100 bearing steel that has been hardened and precision ground. All metal bushings are case hardened and plated to prevent wear and corrosion. POM composite washer bearings replace thrust needle washers for increased service life and superior resistance to water and dirt. This Part Fits: Year Make Model Submodel 1992 1998 Yamaha YFB250