#2 PostAuthor: Big John » Wed Jul 01, 2009 4:43 pm
Not seen one like that before Geoff. At a guess I'd say bend the 4 tangs away from sprocket which will allow the nut cover to be removed and the thin nut underneath to be undone.
86 Z1100R x 2, z7/11r, ZRX400, Z1000B2, ,ZRX1100C4 & Z1000J3.