JTF288.16 JT 16T Front Sprocket
One tooth down on Standard 17T Front Sprocket
CB500 F Four 1972-1977
CB500 K1, K2, K3 1972-1974
CB550 F1, F2, K1, K2, K3 (4 Cylinders) 1975-1980
CB750 F, F1 (4 in 1) 1977
Check Photograph and specs to confirm this is the part you are looking for.
Can be picked up in Heidelberg West Vic