At DMG Motorsports, we present the Vortex F5 Rear Sprocket 45T-520 in Black Hardcoat (Part #251AK-45) — a race-proven, direct-fit replacement sprocket engineered for Honda models running 520 chain pitch. Built by Vortex Racing, a name trusted across Motocross, Supercross, Road Racing, Flat Track, and Minibike paddocks, this F5 sprocket combines lightweight strength with a durable, low-friction finish so you get sharper acceleration and longer service life on the track or street. Whether you're chasing lap times or simply want a cleaner-running, longer-lasting drivetrain component, this Vortex sprocket delivers race-team quality in a bolt-on package.

Features:

• CNC machined from 7075 aluminum for outstanding strength paired with minimal weight
• Hard anodized aerospace-grade aluminum finished with a jet black dye for a clean, aggressive look
• PTFE hard-coat adds lubricity, reduces wear, and makes cleaning easier
• Aluminum construction is significantly lighter than an OEM steel sprocket, cutting rotating mass for improved acceleration and handling
• Unique Vortex tooth design increases sprocket longevity and chain engagement
• 45-tooth, 520-pitch configuration designed to fit specific Honda applications
• 100% CNC-machined to tight tolerances for consistent fitment and performance
• Trusted by champions across multiple motorcycle racing disciplines

Fitment