PROX Cam Chain. 1 x PROX Cam Chain (part number 31.2414). YAMAHA YZ 250 F(2014-2023). YAMAHA YZ 250 FX(2015-2024). YAMAHA WR 250 F(2015-2024). Strong M-type chain that has a special heat treated pin plus advanced pin and link connection for maximum performance and durability.
