
The RFX Pro Series HCS Steel Sprocket (manufacturer part number: FXRS 10-51 99ST) is designed for motocross and enduro riders seeking a robust drive component built to last in muddy terrain. Made from certified high carbon steel, it combines excellent wear resistance with a lightweight profile thanks to CAD design. The CNC laser cutting ensures precise tooth geometry and tight tolerances for smoother power transmission.
Practical compatibility: ideal for 520 pitch, 51-tooth motocross/enduro motorcycles, such as the HONDA CRF 450 (2026 models listed). For installation, follow the manufacturer's manual: clean the hub, position the sprocket, apply appropriate Loctite on the bolts, tighten evenly, and adhere to the recommended torque specifications.