Replacement sprocket bolts for Yamaha OEM part number 90109-081G1-00. These bolts fit YZ, YZ-F, WR, WR-F, and YZ-X and YZ-FX models years 1986-current. Includes six (6) sprocket bolts and six (6) metal locking flange nuts. Our sprocket bolts are class 10.9 hardened steel to match OEM specifications and feature an 8mm Allen head for ease of installation. Black zinc plating ensures a long lasting, rust-free finish, even in harsh off road riding conditions. The locking nuts are OEM style metal Fuji-lock nuts just like what came originally from Japan. As a bonus, our bolts have pre-applied threadlock to ensure these bolts stay tight.