



JT Sprockets Ultra-Light Aluminum Sprocket 853 - 520 (Manufacturer part number: JTA853.51BLK): a sprocket designed for motocross, where lightness and robustness must coexist on the track.
Whether for replacement or to modify the gearing, this JT Sprockets sprocket stands out due to its construction from aerospace-grade aluminum 7075-T6 (Ergal), a material known for its strength while remaining ultra-light. Its black color and "Mud-Resistant" finish facilitate the removal of particles and limit accumulation in the transmission area for more consistent performance in muddy conditions.
Designed to fit a 520 transmission, this sprocket is suitable for riders looking for a lightweight part without sacrificing trail performance. Common compatibility examples include: YAMAHA YZ 400 F (1998), YAMAHA WR 400 F (1998), YAMAHA YZ 250 (1998). Check the desired number of teeth to adjust the gearing of your motorcycle before installation.