All Balls Steering Head Stem Bearing Kit For Yamaha YSR 50 1987-1992 21931 OEM jet sizes are include

OEM jet sizes are include in the kit and kits are based off of U

with the exception of ATV Lower Steering Bearing kits

Fork Seal Dimensions: 45x57

Direct replacement for OEM tapered bearings

All Balls Steering Head Stem Bearing Kit For Yamaha YSR 50 1987-1992 21931 OEM jet sizes are includeSpecifications All Balls Racing Steering Bearing Kits upgrade ball style bearings to heavy duty tapered bearings. Direct replacement for OEM tapered bearings. Kits will include top and bottom bearing assemblies and seals, with the exception of ATV Lower Steering Bearing kits. Steering bearing kits are model specific, be sure to input your vehicle to ensure proper fitment. Kit Contents: Seal 1 Seal 1 Tapered Bearing 1 Tapered Bearing 1