Renthal Front Sprocket 12T 520 Chain Yamaha YZ125 WR200R 257--520-12GP

A worn or undersized front sprocket limits acceleration and forces your engine to work harder, bleeding performance when you need it most. The Renthal 12T Front Sprocket delivers the durability and lightweight efficiency that separates competitive machines from stock setups. Purpose-built for Yamaha YZ125 and WR200R models, this sprocket reduces unsprung weight while maintaining the chain engagement precision required for aggressive riding in mud and sand.

Constructed from case-hardened 655-M13 nickel-chromium steel and CNC-machined to exact tolerances, this sprocket resists tooth wear and maintains consistent power transfer lap after lap. The integrated self-cleaning mud grooves prevent debris accumulation—a critical advantage in off-road conditions where buildup typically causes premature failure and performance degradation. A 10-15% weight reduction improves both acceleration and handling response without compromising strength or reliability.

• Chain size: 520
• Tooth count: 12
• Material: 655-M13 nickel-chromium steel
• Construction: CNC-machined, case-hardened
• Weight reduction: 10-15%
• Self-cleaning grooves: Yes
• Position: Front countershaft
• Fitment: YZ125 (1987-2004), WR200R (1992)
• Finish: Natural
• Installation: Bolt-on