
Manufacturer Ref: FXFS 43-13 99BK
The RFX Pro 13-tooth sprocket is a front sprocket designed for motocross use. CNC machined from high-strength steel and hardened to 60 Rockwell, it offers enhanced wear resistance against the stresses of the transmission. Its mud-resistant version features dirt evacuation grooves on both sides to limit mud accumulation and extend the lifespan of the chain and sprocket.
The black zinc finish protects against light corrosion from washing and humid conditions while providing a sleek and durable look on the bike. Weight-saving holes have been included where necessary to reduce mass without compromising strength.
Designed for motocross riders seeking reliability and durability on trails and tracks, this sprocket fits many 520 applications, including the Suzuki RM-Z 250 models (2024, 2025, 2026) listed among the main applications.