Adopting chromoly steel with durability and strict tolerances for a well alignment. 6 tooth bolt washer with CNC precision machined to stay durable and not easily deformed.
Interchange Part Number: 90179-18020, 90215-21239
Fit for:1987-2006 Yamaha Banshee 350 YFZ350
Easy and direct installation:Lock washer has splines inside just like shaft, just line those splines up, and hold it's outer edge so to keep it engaging the splines then put the nut on.
Package Included:1 x Sprocket Lock Nut + Holder Washer as Pictures