3 Bolt Hub Bolt / Nut Sprocket Retainer Tongued Lock Washer

Absolutely necessary when using a 3-bolt sprocket, this washer when the tongued ends are bent up against the hex head, prevents the bolt or nut from backing out and causing severe swingarm damage. 

Fits all models using a 3-bolt hub, including QA50, Z50, Monkey and CT70/Z50 conversion hubs.