Countershaft seal kits. The bushings have a Rockwell hardness of 55-60 vs. the OEM which is a much softer Rockwell of 40-45 so they will hold up better than OEM. KTM SX 125/150 16-22, XC-W 125/150 17-19, XC 125 21-22. Husqvarna TC 125/150 16-22, TX 125/150 17-19. GasGas MC 125 21-23
