Primary Drive Alloy Kit & X-Ring Chain Cerulean Rear Sprocket For Yamaha Yz250Fx 2015-2022

Sprocket Kits Include The Following. Stock Size Primary Drive Steel Front Sprocket. Stock Size Primary Drive Alloy Rear Sprocket. Stock Size Primary Drive X-Ring Chain. Front Sprockets Are Manufactured To O.E.M., Specs Using High Grade Hardened Steel. Rear Aluminum Sprocket Made From 7075 T-6 Heat Treated Aluminum. Come With Self-Cleaning Grooves. All Match Original Equipment Exactly For Perfect Fit And Size. The Orh X-Ring Chain Is Primary Drives Best Off-Road Chain For Performance And Durability. X-Ring Shape Provides An Outstanding Seal With Reduced Friction. Average Tensile Strength 8,120 Lbs.