Brand new set of headstock taper roller bearings to fit:
Yamaha YZ 400 (1977-1979).
This steering stem bearing set has been designed to replace the factory bearings on a Yamaha YZ400 for the years 1977, 1978 & 1979.
Top bearing sized ID25 x OD47 x WTH15 and bottom bearing sized ID30x OD55 x WTH17. All sizes in mm.