Gearbox sprocket nut upgrade. See the second picture showing nut fitted to gearbox. Fits BSA Pre-unit swingarm models A7 A10 B31 B33 Gold Star etc.
Yamaha MT-09 14-25 Gearbox Sprocket Nut & Washer. Genuine Yamaha New (b14E
TRIUMPH GEARBOX SPROCKET NUT 57-1434 1957-67 T21 3TA TIGER90 5TA T100SS
Yamaha MT-09 14-23 Gearbox Sprocket Nut. Genuine Yamaha New (b14E
Yamaha MT-10 18-20 Gearbox Sprocket Nut. Genuine Yamaha New (b14E
Yamaha R1 07-22 Gearbox Sprocket Nut. Genuine Yamaha New (b14E
Yamaha R6 06-23 Gearbox Sprocket Nut Washer Plate. Genuine Yamaha. New ba3
