At DMG Motorsports, we present the Fire Power MX-50612-4 Front Countershaft Sprocket—a 12-tooth, 520-size steel sprocket designed to deliver dependable drivetrain performance for select GasGas and Yamaha applications. Its case-hardened nickel-chromium steel construction combines durability with an ultra-light design, while precision CNC machining provides extremely close tolerances. The exact product listing identifies fitment for select Yamaha WR250F, YZ125, YZ250F, and YZ250FX models; verify your motorcycle’s year and application before ordering. ([socalpowersports.com](https://www.socalpowersports.com/i-32180061-fire-power-countershaft-steel-front-sprocket-12t-mx-50612-4.html?utm_source=openai))

Features:

• 12-tooth front countershaft sprocket for 520 chain applications
• Nickel-chromium steel construction with case hardening
• Ultra-light design that retains maximum strength
• Precision CNC machined to extremely close tolerances
• Self-cleaning mud grooves where applicable
• Listed for select Yamaha WR250F, YZ125, YZ250F, and YZ250FX applications

Fitment